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We live can you buy over the counter zithromax in unprecedented times. But what makes them without parallel is not the current zithromax crisis nor the continued problems facing minorities in our institutions. Rather, it’s that for the first time, the problems can you buy over the counter zithromax of accessibility, rights and freedoms are now invading privileged spaces.

There can be no ‘getting back to normal’, because ‘normal’ only ever benefited the white, Western, patriarchal, abled and cis ideals. For many, can you buy over the counter zithromax the world is not suddenly on fire. It has long been burning.The present zithromax lays bare systemic prejudice against the most vulnerable among us.

We at Medical Humanities, with our focus on global health and social justice, welcome discussion about how the crisis has disproportionately affected racial and fiscal minorities, those from the disabled community, those who are LGBTQA+ and other vulnerable groups. What we focus on here, now, can lead to greater accessibility and equity in the future.In this expanded issue, we offer some of the incredible work being done across the field of medical humanities prior to the buy antibiotics crisis, and we are already reviewing articles on the can you buy over the counter zithromax role of health humanities during the zithromax. The process of academic publishing tends not to lend itself to immediacy, however, and the challenges of zithromax means greater pressure on everyone, from the authors to the reviewers and readers.To remedy this, we at Medical Humanities have been increasing the work on our blog platform, a place where content can be quickly updated, and where conversations can occur among readers and writers.

We openly invite submissions concerning the zithromax, as well as topics relevant to our wider CFP (call for posts/papers) this year on social can you buy over the counter zithromax justice and health, to both blog and journal. We will do our best to expedite. Finally, we have also been addressing social justice and access in our podcast, where we interviewed disability activist Alice Wong and most recently Dr Oni Blackstock, primary care physician and HIV specialist in New York.

We hope to have many more on these critical subjects.We wish all of you good health and safety and know that many of you are yet on the front can you buy over the counter zithromax lines. Thank you for being part of the community of Medical Humanities.IntroductionMinecraft is a computer game with no specific goals to accomplish. The gameworld consists of three-dimensional (3D) cubes and objects which the can you buy over the counter zithromax player (Steve) can mine and build into infinitely complex (and logically impossible) structures.

Steve sometimes encounters other characters (‘mobs’), such as animals and hostile creatures. He can ‘spawn’ and destroy them. While it looks like a harmless game of logical construction, it conveys some worryingly can you buy over the counter zithromax delusive ideas about the real world.

The difference between real and imagined structures is at the heart of the age-old debate around categorising mental disorders.Classification in mental health has had various forms throughout history. Mack and colleagues set out a history of psychiatric can you buy over the counter zithromax classification beginning in 2600 BC with Egyptian references to melancholia and hysteria. Through the Ancient Greeks with Hippocrates’ phrenitis, mania, melancholia, epilepsy, hysteria and Scythian disease.

Through the Renaissance period. Through to 19th-century psychiatry featuring Pinel (known as the first psychiatrist), Kraepelin (known for observational classification) and Freud (known for classifying neurosis and psychosis).1Although the history of psychiatric classification identifies some common trends such as the labels ‘melancholia’ and ‘hysteria’ which have survived millennia, the label ‘depression’ is relatively can you buy over the counter zithromax new. The earliest usage noted by Snaith is from 1899.

€˜in simple pathological depression…the patient exhibits a growing indifference to his former pursuits…’.2 Snaith noted that early 20th-century can you buy over the counter zithromax psychiatrists like Adolf Meyer hoped that ‘depression’ would come to encompass a broad category under which descriptions of subtypes would emerge. This did not happen until the middle of the 20th century. With the publication of the sixth International Classification of Diseases (ICD) in 1948 and the Diagnostic and Statistical Manual of Mental Disorders (DSM) in 1952 and their subsequent revisions, the latter half of the 20th century has seen depression subtype labels proliferate.

In their study of the social determinants of diagnostic labels in depression, McPherson and can you buy over the counter zithromax Armstrong illustrate how the codification of depression subtypes in the latter half of the 20th century has been shaped by the evolving context of psychiatry, including power struggles within the profession, a move to community care and the development of psychopharmacology.3During this period, McPherson and Armstrong describe how subsequent versions of the DSM served as battlegrounds for professional disputes and philosophical quarrels around categorisation of mental disorders. DSM I and DSM II have been described as products of an American Psychiatric Association dominated by psychoanalytic psychiatrists.4 DSM III and DSM III-R have been described as a radical rejection of psychoanalytic thinking, a ‘neo-Kraepelinian revolution’, a reference to the observational descriptive techniques of 19th-century psychiatrist Emil Kraepelin who classified mental disorders into two broad categories. €˜dementia praecox’ and ‘manic-depression’.5 DSM III was seen by some as a turning point in the use of the medical model of mental illness, through provision can you buy over the counter zithromax of specific inclusion and exclusion criteria, and use of field trials and a multiaxial system.6 These latter technocratic additions to psychiatric labelling served to engender a much closer alignment between psychiatry, science and medicine.The codification of mental disorders in manuals has been described by Thomas Schacht as intrinsic to the relationship between science and politics and the way in which psychiatrists gain significant social power by aligning themselves to science.7 His argument drew on Szasz, who saw the mental health establishment as a therapeutic state.

Zimbardo, who described psychiatric care as a controlling force. And Foucault, who described the categorisation of the mentally ill as a force for isolating ‘the other’. Diagnostic critique has been further developed through a cultural relativist lens in that what Western psychiatrists classify as a depression is constructed differently in other cultures.8 Considering these limitations, some critics have gone so far as to can you buy over the counter zithromax argue that psychiatric diagnostic systems should be abolished.9Yet architects of DSM manuals have worked hard to ensure the technology of classification is regarded as genuine scientific activity with sound roots in philosophy of science.

In their philosophical defence of DSM IV, Allen Frances and colleagues address their critics under the headings ‘nominalism vs realism’, ‘empiricism vs rationalism’ and ‘categorical vs dimensional’.10 The implication is that there are opposing stances in which a choice must be made or a middle ground forged by those reasonable enough to recognise the need for pragmatism in the service of clinical utility. The nominalism–realism debate is illustrated using can you buy over the counter zithromax as metaphor three different stances a cricket umpire might take on calling strikes and balls. The discussion sets out two of these as extreme views.

€˜at one extreme…those who take a reductionistically realistic view of the world’ versus ‘the solipsistic nominalists…might content that nothing exists’. Szasz, who is can you buy over the counter zithromax characterised as holding particularly extreme views, is named as an archetypal solipsist. There is implied to be a degree of arrogance associated with this view in the illustrative example in which the umpire states ‘there are no balls and there are no strikes until I call them’.

Frances therefore sets up a means of grouping two kinds of people as philosophical extremists who can be dismissed, while avoiding addressing the philosophical problems they pose.Frances provides little if any justification for the middle ground stance, ‘There are balls and there are strikes and I call them as I can you buy over the counter zithromax see them’, other than to focus on its clinical utility and the lack of clinical utility in the alternatives ‘naïve realism’ and ‘heuristically barren solipsism’. The natural conclusion the reader is invited to reach is that a middle ground of a heuristic concept is naturally right because it is not extreme and is naturally useful clinically, without specifying in what way this stance is coherent, resolves the two alternatives, and in what way a heuristic construct that is not ‘real’ can be subject to scientific testing.Similarly, in discussing the ‘categorical vs dimensional’, Frances promotes the ‘prototype approach’. Those holding opposing views are labelled as ‘dualists’ or ‘dichotomisers’.

The prototypical approach is again put forward as a clinically useful middle ground can you buy over the counter zithromax. Illustrations are drawn from natural science. €˜a triangle and a square are never the same’, inciting the reader to consider science as value-free can you buy over the counter zithromax.

The prototypical approach emerges as a natural solution, yet the authors do not address how a diagnostic prototype resolves the issues posed by the two alternatives, nor how a prototype can be subjected to natural science methods.The argument presented here is not a defence of solipsism or dualism. Rather it aims to illustrate that if for pragmatic purposes clinicians and policymakers choose to gloss over the philosophical flaws in classification practices, it is then risky to move beyond the heuristic and apply natural science methods to these constructs adding multiple layers of technocratic subclassification. Doing so is more can you buy over the counter zithromax like playing Minecraft than cricket.

The National Institute for Health and Care Excellence (NICE) guideline for depression is taken as an example of the philosophical errors that can follow from playing Minecraft with unsound heuristic devices, specifically subcategories of persistent forms of depression. As well as serving a clinical purpose, diagnosis in medicine is a way of allocating resources can you buy over the counter zithromax for insurance companies and constructing clinical guidelines, which in turn determine rationing within the National Health Service. The consequences for recipients of healthcare are therefore significant.

Clinical utility is arguably not being served at all and patients are left at risk of poor-quality care.Heterogeneity of persistent depressionAndrea Jobst and colleagues note that ‘because of their chronic clinical course, approximately 40% of CD [chronic depression] patients also fulfil criteria for TRD [treatment resistant depression]…usually defined by the number of non-successful biological treatments’.11 This position is reflected in the DSM VAmerican Psychiatric Association (2013), the European Psychiatric Association (EPA) guidance and the ICD-11(World Health Organisation, 2018), which all use a ‘persistent’ depression category, acknowledging a loosely defined mixed group of long-term, difficult-to-treat depressive conditions, often associated with dysthymia and comorbid common mental disorders, various personality traits and psychosocial disability.In contrast, the NICE 2018 draft guideline separates treatments into those for ‘new episodes’ of depression. €˜further-line’ treatment of can you buy over the counter zithromax depression (equivalent to TRD), CD and ‘depression with co-morbidities’. The latter is subdivided into treatments for ‘complex depression’ and ‘psychotic depression’.

These categories can you buy over the counter zithromax and subcategories introduce an unfortunate sense of certainty as though these labels represent real things. An analysis follows of how these definitions play out in terms of grouping of randomised controlled trials in the NICE evidence review. Specifically, the analysis reveals the overlap between populations in trials which have been separated into discrete categories, revealing significant limitations to the utility of the category labels.The NICE definition of CD requires trial samples to meet the criteria for major depressive disorder (MDD) for 2 years.

Dysthymia and double depression (MDD superimposed on dysthymia) were can you buy over the counter zithromax included. If 75% of the trial population met these criteria, the trial was reviewed in the CD category.12 The definition of TRD (or ‘further-line treatments’) required that the trial sample had demonstrated a ‘limited response to previous treatment’ and randomised to the further-line treatment at this point. If 80% of the trial participants met these criteria, it was reviewed in the TRD category.13 Complex depression was defined as ‘depression co-existing with personality can you buy over the counter zithromax disorder’.

To be classed as complex, 51% of trial participants had to have personality disorder (PD).14It is immediately clear from these definitions that there is a potential problem with attempting to categorise trial populations into just one of these categories. These populations are likely to overlap, whether or not a trial protocol sets out to explicitly record all of this information. The analysis below will illustrate this using examples from within the NICE can you buy over the counter zithromax review.Cataloguing complexity in trial populationsWithin the category of further-line treatments (TRD), 64 trials were reviewed.

Comparisons within these trials were further subcategorised into ‘dose escalation strategies’, ‘augmentation strategies’ and ‘switching strategies’. In drilling down by way of illustration, this analysis considers the 51 trials in the augmentation can you buy over the counter zithromax strategy evidence review. Of these, two were classified by the reviewers as also fulfilling the criteria for CD but were not analysed in the CD category (Study IDs.

Fonagy 2015 and Kocsis 200915). About half of the trials (23/51) did not report the mean duration of episode, meaning that it is not possible to know what percentage of can you buy over the counter zithromax participants also met the criteria for CD. Of trials that did report episode duration, 17 reported a mean duration longer than 24 months.

While the standard deviations varied in size or were unreported, the mean indicates a good likelihood that a significant proportion of the participants across these 51 trials met the criteria for CD.Details of baseline employment, trauma can you buy over the counter zithromax history, suicidality, physical comorbidity, axis I comorbidity and PD (all clinical indicators of complexity, severity and chronicity) were not collated by NICE. For the present analysis, all 51 publications were examined and data compiled concerning clinical complexity in the trial populations. Only 14 of 51 trials report employment data.

Of those that do, can you buy over the counter zithromax unemployment ranges from 12% to 56% across trial samples. None of the trials report trauma history. About half of the can you buy over the counter zithromax trials (26/51) excluded people who were considered a suicide risk.

The others did not.A large proportion of trials (30/51) did not provide any data on axis 1 comorbidity. Of these, 18 did not exclude any diagnoses, while 12 excluded some (but not all) disorders. The most common diagnoses excluded were can you buy over the counter zithromax psychotic disorders, substance or alcohol abuse, and bipolar disorder (excluded in 26, 25 and 23 trials, respectively).

Only 7 of 51 trials clearly stated that all axis 1 diagnoses were excluded. This leaves only 13 studies can you buy over the counter zithromax providing any data about comorbidity. Of these, 9 gave partial data on one or two conditions, while 4 reported either the mean number of disorders (range 1.96–2.9) or the percentage of participants (range 68.1–96.7) with any comorbid diagnosis (Nierenberg 2003a, Nierenberg 2006, Watkins 2011a, Town 201715).The majority of trials (46/51) did not report the prevalence of PD.

Many stated PD as an exclusion criterion but without defining a threshold for exclusion. For example, PD could be excluded if it ‘impacted’ can you buy over the counter zithromax the depression, if it was ‘significant’, ‘severe’ or ‘persistent’. Some excluded certain PDs (such as antisocial or borderline) and not others but without reporting the prevalence of those not excluded.

In the five trials where prevalence was clear, prevalence ranged from 0% (Ravindran 2008a15), where all PDs were excluded, to 87.5% of the sample (Town can you buy over the counter zithromax 201715). Two studies reported the mean number of PDs. 2.0 (Nierenberg 2003a) and 0.85 (Watkins 2011a15).The majority of trials (43/51) did not report the prevalence of physical illness.

Many stated illness as an exclusion criterion, but the definitions and thresholds can you buy over the counter zithromax were vague and could be interpreted in different ways. For example, illness could be excluded if it was ‘unstable’, ‘serious’, ‘significant’, ‘relevant’, or would ‘contraindicate’ or ‘impact’ the medication. Of the eight trials reporting information about physical health, there was a wide variation can you buy over the counter zithromax.

Four reported prevalence varying from 7.6% having a disability (Eisendrath 201615) to 90.9% having an illness or disability (Town 201715). Four used scales of physical health. Two indicating mild problems (Nierenberg 2006, can you buy over the counter zithromax Lavretsky 201115) and two indicating moderately high levels of illness (Thase 2007, Fang 201015).The NICE review also divided trial populations into a dichotomy of ‘more severe’ and ‘less severe’ on the grounds that this would be a clinically useful classification for general practitioners.

NICE applied a bespoke methodology for creating this dichotomy, abandoning validated measure thresholds in order first to generate two ‘homogeneous’ groups to ‘facilitate analysis’, and second to create an algorithm to ‘read across’ different measures (such as the Beck Depression Inventory, the Hamilton Rating Scale for Depression (HRSD) and the Montgomery-Asberg Depression Rating Scale).16 Examining trials which use more than one of these measures reveals problems in the algorithm. Of the 51 trials, there are 6 instances in which the study population falls into NICE’s more severe category according to one measure and into the less severe category according to can you buy over the counter zithromax another. In four of these trials, NICE chose the less severe category (Souza 2016, Watkins 2011a, Fonagy 2015, Town 201715).

The other two trials were designated more severe (Barbee 2011, Dunner 200715). Only 17 of 51 trials reported two or more can you buy over the counter zithromax depression scale measures, leaving much unknown about whether other study populations could count as both more severe and less severe.Absence of knowledge or knowledge of absence?. A key philosophical error in science is to confuse an absence of knowledge with knowledge of absence.

It is likely that some of the can you buy over the counter zithromax study populations deemed lacking in complexity or severity could actually have high degrees of complexity and/or severity. Data to demonstrate this may either fall foul of a guideline committee decision to prioritise certain information over other conflicting information (as in the severity algorithm). The information may be non-existent as it was not collected.

It may can you buy over the counter zithromax be somewhere in the publication pipeline. Or it may be sitting in a database with a research team that has run out of funds for supplementary analyses. Wherever those data are or are not, their absence from published can you buy over the counter zithromax articles does not define the phenomenology of depression for the patients who took part.

As a case in point, data from the Fonagy 2015 trial presented at conferences but not published reveal that PD prevalence data would place the trial well within the NICE complex depression category, and that the sample had high levels of past trauma and physical condition comorbidity. The trial also meets the guideline criteria for CD according to the guideline’s own appendices.17 Reported axis 1 comorbidity was high (75.2% had anxiety disorder, 18.6% had substance abuse disorder, 13.2% had eating disorder).18 The mean depression scores at baseline were 36.5 on the Beck Depression Inventory and 20.1 on the HRSD (severe and very severe, respectively, according to published cut-off scores). NICE categorised this population as less severe TRD, not CD and not complex.Notes1 can you buy over the counter zithromax.

Avram H. Mack et can you buy over the counter zithromax al. (1994), “A Brief History of Psychiatric Classification.

From the Ancients to DSM-IV,” Psychiatric Clinics 17, no. 3. 515–9.2.

R. P. Snaith (1987), “The Concepts of Mild Depression,” British Journal of Psychiatry 150, no.

3. 387.3. Susan McPherson and David Armstrong (2006), “Social Determinants of Diagnostic Labels in Depression,” Social Science &.

Gerald N. Grob (1991), “Origins of DSM-I. A Study in Appearance and Reality,” The American Journal of Psychiatry.

421–31.5. Wilson M. Compton and Samuel B.

Guze (1995), “The Neo-Kraepelinian Revolution in Psychiatric Diagnosis,” European Archives of Psychiatry and Clinical Neuroscience 245, no. 4. 198–9.6.

Gerald L. Klerman (1984), “A Debate on DSM-III. The Advantages of DSM-III,” The American Journal of Psychiatry.

539–42.7. Thomas E. Schacht (1985), “DSM-III and the Politics of Truth,” American Psychologist.

Theurer (2018), “Psychiatry Should Not Seek Mechanisms of Disorder,” Journal of Theoretical and Philosophical Psychology 38, no. 4. 189–204.9.

Sami Timimi (2014), “No More Psychiatric Labels. Why Formal Psychiatric Diagnostic Systems Should Be Abolished,” Journal of Clinical and Health Psychology 14, no. 3.

208–15.10. Allen Frances et al. (1994), “DSM-IV Meets Philosophy,” The Journal of Medicine and Philosophy.

A Forum for Bioethics and Philosophy of Medicine 19, no. 3. 207–18.11.

Andrea Jobst et al. (2016), “European Psychiatric Association Guidance on Psychotherapy in Chronic Depression Across Europe,” European Psychiatry 33. 20.12.

National Institute for Health and Care Excellence (2018), Depression in Adults. Treatment and Management. Draft for Consultation, https://www.nice.org.uk/guidance/gid-cgwave0725/documents/full-guideline-updated, 507.13.

Ibid., 351–62.14. Ibid., 597.15. Note that in order to refer to specific trials reviewed in the guideline, rather than the full citation, the Study IDs from column A in appendix J5 have been used.

See www.nice.org.uk/guidance/gid-cgwave0725/documents/addendum-appendix-9 for details and full references.16. National Institute for Health and Care Excellence (2018), Depression in Adults. Treatment and Management.

Second Consultation on Draft Guideline – Stakeholder Comments Table, https://www.nice.org.uk/guidance/gid-cgwave0725/documents/consultation-comments-and-responses-2, 420–1.17. National Institute for Health and Care Excellence (2018), Depression in Adults, appendix J5.18. Peter Fonagy et al.

(2015), “Pragmatic Randomized Controlled Trial of Long-Term Psychoanalytic Psychotherapy for Treatment-Resistant Depression. The Tavistock Adult Depression Study (TADS),” World Psychiatry 14, no. 3.

312–21.19. American Psychological Association (2018), Clinical Practice Guideline for the Treatment of Depression in Children, Adolescents, and Young, Middle-aged, and Older Adults. Draft.20.

Jacqui Thornton (2018), “Depression in Adults. Campaigners and Doctors Demand Full Revision of NICE Guidance,” BMJ 361. K2681..

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A new exception for donations can you buy over the counter zithromax of cybersecurity technology and related services. And amendments to the existing exception for electronic health records (EHR) items and services. The proposed rule also provides critically necessary guidance for physicians and health care providers and suppliers whose financial relationships are governed by the physician self-referral statute and regulations.

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In addition, in accordance with section 1871(a)(3)(B) of the Act, the Secretary may extend the initial targeted publication date of the final regulation if the Secretary, no later than the regulation's previously established proposed publication date, publishes a notice with the can you buy over the counter zithromax new target date, and such notice includes a brief explanation of the justification for the variation. We announced in the Spring 2020 Unified Agenda (June 30, 2020, www.reginfo.gov) that we would issue the final rule in August 2020. However, we are still working through the Start Printed Page 52941complexity of the issues raised by comments received on the proposed rule and therefore we are not able to meet the announced publication target date.

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IntroductionIn recent years, many studies have been published on new diagnostic possibilities and management approaches in cohorts of patients suspected to have a disorder/difference https://www.innovationsregion-mitteldeutschland.com/purchase-zithromax/ of what can substitute zithromax sex development (DSD).1–13 Based on these studies, it has become clear that services and institutions still differ in the composition of the multidisciplinary teams that provide care for patients who have a DSD.11 14 Several projects have now worked to resolve this variability in care. The European Cooperation in Science and Technology (EU COST) action BM1303 ‘A systematic elucidation of differences of sex development’ has been a platform to achieve European agreement on harmonisation of clinical management and laboratory practices.15–17 Another such initiative involved an update of the what can substitute zithromax 2006 DSD consensus document by an international group of professionals and patient representatives.18 These initiatives have highlighted how cultural and financial aspects and the availability of resources differ significantly between countries and societies, a situation that hampers supranational agreement on common diagnostic protocols. As only a few national guidelines have been published in international journals, comparison of these guidelines is difficult even though such a comparison is necessary to capture the differences and initiate actions to overcome them. Nonetheless, four DSD (expert) centres located in the Netherlands and Flanders (the Dutch-speaking Northern part of Belgium) have collaborated to produce a detailed guideline on diagnostics what can substitute zithromax in DSD.19 This shows that a supranational guideline can be a reasonable approach for countries with similarly structured healthcare systems and similar resources. Within the guideline there is agreement that optimisation of expertise and care can be achieved through centralisation, for example, by limiting analysis of next-generation sequencing (NGS)-based diagnostic panels to only a few centres and by centralising pathological review of gonadal tissues.

International networks such as the European Reference Network for rare endocrine conditions (EndoERN), in which DSD is embedded, may facilitate the expansion of this kind of collaboration across Europe.This paper highlights key discussion points in the Dutch-Flemish guideline that have been insufficiently addressed in the literature thus far because they reflect evolving technologies or less visible stakeholders what can substitute zithromax. For example, prenatal observation of an atypical aspect of the genitalia indicating a possible DSD is becoming increasingly common, and we discuss appropriate counselling and a diagnostic approach for these cases, including the option of using NGS-based genetic testing. So far, little attention has been paid to this process.20 21 Furthermore, informing patients and/or their parents about atypical sex development and why this may warrant referral to a specialised team may be challenging, especially for professionals with limited experience in DSD.22 23 Therefore, a section what can substitute zithromax of the Dutch-Flemish guideline was written for these healthcare providers. Moreover, this enables DSD specialists to refer to the guideline when advising a referral. Transition from the prenatal to the postnatal what can substitute zithromax team and from the paediatric to the adult team requires optimal communication between the specialists involved.

Application of NGS-based techniques may lead to a higher diagnostic yield, providing a molecular genetic diagnosis in previously unsolved cases.16 We address the timing of this testing and the problems associated with this technique such as the interpretation of variants of unknown clinical significance (VUS). Similarly, histopathological interpretation and classification of removed gonadal tissue is challenging and would benefit from international collaboration and centralisation of expertise.MethodsFor the guideline what can substitute zithromax revision, an interdisciplinary multicentre group was formed with all members responsible for updating the literature for a specific part of the guideline. Literature search in PubMed was not systematic, but rather intended to be broad in order to cover all areas and follow expert opinions. This approach is more in line with the Clinical Practice Advisory Document method described by Burke et al24 for guidelines involving genetic practice because it is often troublesome to substantiate such guidelines with sufficient evidence due to the rapid changes in testing methods, what can substitute zithromax for example, gene panels. All input provided by the group was synthesised by the chairperson (YvB), who also reviewed abstracts of papers on DSD published between 2010 and September 2017 for the guideline and up to October 2019 for this paper.

Abstracts had what can substitute zithromax to be written in English and were identified using a broad range of Medical Subject Headings terms (eg, DSD, genetic, review, diagnosis, diagnostics, 46,XX DSD, 46,XY DSD, guideline, multidisciplinary care). Next, potentially relevant papers on diagnostic procedures in DSD were selected. Case reports were excluded, as were articles that were not open access or retrievable through institutional access what can substitute zithromax. Based on this, a draft guideline was produced that was in line with the international principles of good diagnostic care in DSD. This draft was discussed by the writing committee and, after having obtained agreement on remaining points of discussion, what can substitute zithromax revised into a final draft.

This version was sent to a broad group of professionals from academic centres and DSD teams whose members had volunteered to review the draft guideline. After receiving and incorporating their input, the final version was presented what can substitute zithromax to the paediatric and genetic associations for approval. After approval by the members of the paediatric (NVK), clinical genetic (VKGN) and genetic laboratory (VKGL) associations, the guideline was published on their respective websites.19 Although Turner syndrome and Klinefelter syndrome are considered to be part of the DSD spectrum, they are not extensively discussed in this diagnostic guideline as guidelines dedicated to these syndromes already exist.25 26 However, some individuals with Turner syndrome or Klinefelter syndrome may present with ambiguous or atypical genitalia and may therefore initially follow the DSD diagnostic process.Guideline highlightsPrenatal settingPresentationThe most frequent prenatal presentation of a DSD condition is atypical genitalia found on prenatal ultrasound as an isolated finding or in combination with other structural anomalies. This usually occurs after the 20-week routine medical ultrasound for screening of congenital anomalies, but may also occur earlier, for example, when a commercial ultrasound is performed at the request of the parents.Another way DSD can be diagnosed before birth is when invasive prenatal genetic testing carried out for a different reason, for example, due to suspicion of other structural anomalies, reveals a discrepancy between the genotypic sex and the phenotypic sex what can substitute zithromax seen by ultrasound. In certified laboratories, the possibility of a sample switch is extremely low but should be ruled out immediately.

More often, the discrepancy will be due to sex-chromosome mosaicism or a true form of DSD.A situation now occurring with increasing frequency is a discrepancy between the what can substitute zithromax genotypic sex revealed by non-invasive prenatal testing (NIPT), which is now available to high-risk pregnant women in the Netherlands and to all pregnant women in Belgium, and later ultrasound findings. NIPT screens for CNVs in the fetus. However, depending on legal what can substitute zithromax restrictions and/or ethical considerations, the X and Y chromosomes are not always included in NIPT analysis and reports. If the X and Y chromosomes are included, it is important to realise that the presence of a Y-chromosome does not necessarily imply male fetal development. At the time that NIPT is performed (usually 11–13 weeks), genital development cannot be reliably appreciated by ultrasound, so any discrepancy or atypical aspect of the genitalia will only be noticed later in pregnancy and should prompt further evaluation.Counselling and diagnosticsIf a DSD is suspected, first-line sonographers and obstetricians should refer the couple to their colleague prenatal specialists working with or in a what can substitute zithromax DSD team.

After confirming an atypical genital on ultrasound, the specialist team should offer the couple a referral for genetic counselling to discuss the possibility of performing invasive prenatal testing (usually an amniocentesis) to identify an underlying cause that fits the ultrasound findings.22 23 To enable the parents to make a well-informed decision, prenatal counselling should, in our opinion, include. Information on the ultrasound findings and the limitations of this technique what can substitute zithromax. The procedure(s) that can be followed, including the risks associated with an amniocentesis. And the type of information genetic testing can what can substitute zithromax and cannot provide. Knowing which information has been provided and what words have been used by the prenatal specialist is very helpful for those involved in postnatal care.It is important that parents understand that the biological sex of a baby is determined by a complex interplay of chromosomes, genes and hormones, and thus that assessment of the presence or absence of a Y-chromosome alone is insufficient to assign the sex of their unborn child or, as in any unborn child, say anything about the child’s future gender identity.Expecting parents can be counselled by the clinical geneticist and the psychologist from the DSD team, although other DSD specialists can also be involved.

The clinical geneticist should be experienced in prenatal counselling and well informed about the diagnostic possibilities given the limited time span in which test results need to be available to allow parents what can substitute zithromax to make a well-informed decision about whether or not to continue the pregnancy. Termination of pregnancy can be considered, for instance, in a syndromic form of DSD with multiple malformations, but when the DSD occurs as an apparently isolated condition, expecting parents may what can substitute zithromax also consider termination of pregnancy, which, although considered controversial by some, is legal in Belgium and the Netherlands. The psychologist of the DSD team can support parents during and after pregnancy and help them cope with feelings of uncertainty and eventual considerations of a termination of pregnancy, as well as with practical issues, for example, how to inform others. The stress of not knowing exactly what the child’s genitalia will look like what can substitute zithromax and uncertainty about the diagnosis, treatment and prognosis cannot be avoided completely. Parents are informed that if the postnatal phenotype is different from what was prenatally expected, the advice given about diagnostic testing can be adjusted accordingly, for example, if a hypospadias is milder than was expected based on prenatal ultrasound images.

In our what can substitute zithromax experience, parents appreciate having already spoken to some members of the DSD team during pregnancy and having a contact person before birth.After expert prenatal counselling, a significant number of pregnant couples decline prenatal testing (personal experience IALG, MK, ABD, YvB, MC and HC-vdG). At birth, umbilical cord blood is a good source for (molecular) karyotyping and storage of DNA and can be obtained by the obstetrician, midwife or neonatologist. The terminology used in communication with parents should be carefully chosen,22 23 and midwives and staff of neonatal and delivery units should be clearly instructed to use gender-neutral and non-stigmatising vocabulary (eg, ‘your baby’) as long as sex assignment what can substitute zithromax is pending.An algorithm for diagnostic evaluation of a suspected DSD in the prenatal situation is proposed in figure 1. When couples opt for invasive prenatal diagnosis, the genetic analysis usually involves an (SNP)-array. It was recently estimated that >30% of individuals who have a DSD have what can substitute zithromax additional structural anomalies, with cardiac and neurological anomalies and fetal growth restriction being particularly common.27 28 If additional anomalies are seen, the geneticist can consider specific gene defects that may underlie a known genetic syndrome or carry out NGS.

NGS-based techniques have also now made their appearance in prenatal diagnosis of congenital anomalies.29 30 Panels using these techniques can be specific for genes involved in DSD, or be larger panels covering multiple congenital anomalies, and are usually employed with trio-analysis to compare variants identified in the child with the parents’ genetics.29–31 Finding a genetic cause before delivery can help reduce parental stress in the neonatal period and speed up decisions regarding gender assignment. In such cases what can substitute zithromax there is no tight time limit, and we propose completing the analysis well before the expected delivery.Disorders/differences of sex development (DSD) in the prenatal setting. A diagnostic algorithm. *SOX9. Upstream anomalies and balanced translocations at promotor sites!.

Conventional karyotyping can be useful. NGS, next-generation sequencing." data-icon-position data-hide-link-title="0">Figure 1 Disorders/differences of sex development (DSD) in the prenatal setting. A diagnostic algorithm. *SOX9. Upstream anomalies and balanced translocations at promotor sites!.

Conventional karyotyping can be useful. NGS, next-generation sequencing.First contact by a professional less experienced in DSDWhereas most current guidelines start from the point when an individual has been referred to the DSD team,1 15 the Dutch-Flemish guideline dedicates a chapter to healthcare professionals less experienced in DSD as they are often the first to suspect or identify such a condition. Apart from the paper of Indyk,7 little guidance is available for these professionals about how to act in such a situation. The chapter in the Dutch-Flemish guideline summarises the various clinical presentations that a DSD can have and provides information on how to communicate with parents and/or patients about the findings of the physical examination, the first-line investigations and the need for prompt referral to a specialised centre for further evaluation. Clinical examples are offered to illustrate some of these recurring situations.

The medical issues in DSD can be very challenging, and the social and psychological impact is high. For neonates with ambiguous genitalia, sex assignment is an urgent and crucial issue, and it is mandatory that parents are informed that it is possible to postpone registration of their child’s sex. In cases where sex assignment has already taken place, the message that the development of the gonads or genitalia is still atypical is complicated and distressing for patients and parents or carers. A list of contact details for DSD centres and patient organisations in the Netherlands and Flanders is attached to the Dutch-Flemish guideline. Publishing such a list, either in guidelines or online, can help healthcare professionals find the nearest centres for consultations and provide patients and patient organisations with an overview of the centres where expertise is available.Timing and place of genetic testing using NGS-based gene panelsThe diagnostic workup that is proposed for 46,XX and 46,XY DSD is shown in figures 2 and 3, respectively.

Even with the rapidly expanding molecular possibilities, a (family) history and a physical examination remain the essential first steps in the diagnostic process. Biochemical and hormonal screening aim at investigating serum electrolytes, renal function and the hypothalamic-pituitary-gonadal and hypothalamic-pituitary-adrenal axes. Ultrasound screening of kidneys and internal genitalia, as well as establishing genotypic sex, should be accomplished within 48 hours and complete the baseline diagnostic work-up of a child born with ambiguous genitalia.1 16 32 3346,XX disorders/differences of sex development (DSD) in the postnatal setting. A diagnostic algorithm. NGS, next-generation sequencing.

CAH, Congenital adrenal hyperplasia. AMH, Anti-Müllerian Hormone." data-icon-position data-hide-link-title="0">Figure 2 46,XX disorders/differences of sex development (DSD) in the postnatal setting. A diagnostic algorithm. NGS, next-generation sequencing. CAH, Congenital adrenal hyperplasia.

AMH, Anti-Müllerian Hormone.46,XY disorders/differences of sex development (DSD) in the postnatal setting. A diagnostic algorithm. * SOX9. Upstream anomalies and balanced translocations at promotor sites!. Conventional karyotyping can be useful.

NGS, next-generation sequencing." data-icon-position data-hide-link-title="0">Figure 3 46,XY disorders/differences of sex development (DSD) in the postnatal setting. A diagnostic algorithm. *SOX9. Upstream anomalies and balanced translocations at promotor sites!. Conventional karyotyping can be useful.

NGS, next-generation sequencing.Very recently, a European position paper has been published focusing on the genetic workup of DSD.16 It highlights the limitations and drawbacks of NGS-based tests, which include the chance of missing subtle structural variants such as CNVs and mosaicism and the fact that NGS cannot detect methylation defects or other epigenetic changes.16 28 31 Targeted DNA analysis is preferred in cases where hormonal investigations suggest a block in steroidogenesis (eg, 11-β-hydroxylase deficiency, 21-hydroxylase deficiency), or in the context of a specific clinical constellation such as the often coincidental finding of Müllerian structures in a boy with normal external genitalia or cryptorchidism, that is, persistent Müllerian duct syndrome.33 34 Alternative tests should also be considered depending on the available information. Sometimes, a simple mouth swab for FISH analysis can detect mosaic XY/X in a male with hypospadias or asymmetric gonadal development or in a female with little or no Turner syndrome stigmata and a normal male molecular karyotyping profile or peripheral blood karyotype. Such targeted testing avoids incidental findings and is cheaper and faster than analysis of a large NGS-based panel, although the cost difference is rapidly declining.However, due to the genetic and phenotypic heterogeneity of DSD conditions, the most cost-effective next steps in the majority of cases are whole exome sequencing followed by panel analysis of genes involved in genital development and function or trio-analysis of a large gene panel (such as a Mendeliome).16 35–38 Pretest genetic counselling involves discussing what kind of information will be reported to patients or parents and the chance of detecting VUS, and the small risk of incidental findings when analysing a DSD panel should be mentioned. Laboratories also differ in what class of variants they report.39 In our experience, the fear of incidental findings is a major reason why some parents refrain from genetic testing.Timing of the DSD gene panel analysis is also important. While some patients or parents prefer that all diagnostic procedures be performed as soon as possible, others need time to reflect on the complex information related to more extensive genetic testing and on its possible consequences.

If parents or patients do not consent to panel-based genetic testing, analysis of specific genes, such as WT1, should be considered when appropriate in view of the clinical consequences if a mutation is present (eg, clinical surveillance of renal function and screening for Wilms’ tumour in the case of WT1 mutations). Genes that are more frequently involved in DSD (eg, SRY, NR5A1) and that match the specific clinical and hormonal features in a given patient could also be considered for sequencing. Targeted gene analysis may also be preferred in centres located in countries that do not have the resources or technical requirements to perform NGS panel-based genetic testing. Alternatively, participation by these centres in international collaborative networks may allow them to outsource the molecular genetic workup abroad.Gene panels differ between centres and are regularly updated based on scientific progress. A comparison of DSD gene panels used in recent studies can be found at https://www.nature.com/articles/s41574-018-0010-8%23Sec46.15 The panels currently used at the coauthors’ institutions can be found on their respective websites.

Given the pace of change, it is important to regularly consider repeating analysis in patients with an unexplained DSD, for example, when they transition into adult care or when they move from one centre to another. This also applies to patients in whom a clinical diagnosis has never been genetically confirmed. Confusion may arise when the diagnosis cannot be confirmed or when a mutation is identified in a different gene, for example, NR5A1 in someone with a clinical diagnosis of CAIS that has other consequences for relatives. Hence, new genetic counselling should always accompany new diagnostic endeavours.Class 3 variants and histopathological examinationsThe rapidly evolving diagnostic possibilities raise new questions. What do laboratories report?.

How should we deal with the frequent findings of mainly unique VUS or class 3 variants (ACMG recommendation) in the many different DSD-related genes in the diagnostic setting?. Reporting VUS can be a source of uncertainty for parents, but not reporting these variants precludes further investigations to determine their possible pathogenicity. It can also be difficult to prove variant pathogenicity, both on gene-level and variant-level.39 Moreover, given the gonad-specific expression of some genes and the variable phenotypic spectrum and reduced penetrance, segregation analysis is not always informative. A class 3 variant that does not fit the clinical presentation may be unrelated to the observed phenotype, but it could also represent a newly emerging phenotype. This was recently demonstrated by the identification of the NR5A1 mutation, R92W, in individuals with 46,XX testicular and ovotesticular DSD.40 This gene had previously been associated with 46,XY DSD.

In diagnostic laboratories, there is usually no capacity or expertise to conduct large-scale functional studies to determine pathogenicity of these unique class 3 VUS in the different genes involved in DSD. Functional validation of variants identified in novel genes may be more attractive in a research context. However, for individual families with VUS in well-established DSD genes such as AR or HSD17B3, functional analysis may provide a confirmed diagnosis that implies for relatives the option of undergoing their own DNA analysis and estimating the genetic risk of their own future offspring. This makes genetic follow-up important in these cases and demonstrates the usefulness of international databases and networks and the centralisation of functional studies of genetic variants in order to reduce costs and maximise expertise.The same is true for histopathological description, germ-cell tumour risk assessment in specific forms of DSD and classification of gonadal samples. Germ-cell tumour risk is related to the type of DSD (among other factors), but it is impossible to make risk estimates in individual cases.41–44 Gonadectomy may be indicated in cases with high-risk dysgenetic abdominal gonads that cannot be brought into a stable superficial (ie, inguinal, labioscrotal) position that allows clinical or radiological surveillance, or to avoid virilisation due to 5-alpha reductase deficiency in a 46,XY girl with a stable female gender identity.45 Pathological examination of DSD gonads requires specific expertise.

For example, the differentiation between benign germ cell abnormalities, such as delayed maturation and (pre)malignant development of germ cells, is crucial for clinical management but can be very troublesome.46 Centralised pathological examination of gonadal biopsy and gonadectomy samples in one centre, or a restricted number of centres, on a national scale can help to overcome the problem of non-uniform classification and has proven feasible in the Netherlands and Belgium. We therefore believe that uniform assessment and classification of gonadal differentiation patterns should also be addressed in guidelines on DSD management.International databases of gonadal tissues are crucial for learning more about the risk of malignancy in different forms of DSD, but they are only reliable if uniform criteria for histological classification are strictly applied.46 These criteria could be incorporated in many existing networks such as the I-DSD consortium, the Disorders of Sex Development Translational Research Network, the European Reference Network on Urogenital Diseases (eUROGEN), the EndoERN and COST actions.15–17 47Communication at the transition from paediatric to adult carePaediatric and adult teams need to collaborate closely to facilitate a well-organised transition from paediatric to adult specialist care.15 48–50 Both teams need to exchange information optimally and should consider transition as a longitudinal process rather than a fixed moment in time. Age-appropriate information is key at all ages, and an overview of topics to be discussed at each stage is described by Cools et al.15 Table 1 shows an example of how transition can be organised.View this table:Table 1 Example of transition table as used in the DSD clinic of the Erasmus Medical CenterPsychological support and the continued provision of information remains important for individuals with a DSD at all ages.15 22 In addition to the information given by the DSD team members, families and patients can benefit from resources such as support groups and information available on the internet.47 Information available online should be checked for accuracy and completeness when referring patients and parents to internet sites.Recommendations for future actionsMost guidelines and articles on the diagnosis and management of DSD are aimed at specialists and are only published in specialist journals or on websites for endocrinologists, urologists or geneticists. Yet there is a need for guidelines directed towards first-line and second-line healthcare workers that summarise the recommendations about the first crucial steps in the management of DSD. These should be published in widely available general medical journals and online, along with a national list of DSD centres.

Furthermore, DSD (expert) centres should provide continuous education to all those who may be involved in the identification of individuals with a DSD in order to enable these healthcare professionals to recognise atypical genitalia, to promptly refer individuals who have a DSD and to inform the patient and parents about this and subsequent diagnostic procedures.As DSD continues to be a rare condition, it will take time to evaluate the effects of having such a guideline on the preparedness of first-line and second-line healthcare workers to recognise DSD conditions. One way to evaluate this might be the development and use of questionnaires asking patients, carers and families and referring physicians how satisfied they were with the initial medical consultation and referral and what could be improved. A helpful addition to existing international databases that collect information on genetic variations would be a list of centres that offer suitable functional studies for certain genes, ideally covering the most frequently mutated genes (at minimum).Patient organisations can also play an important role in informing patients about newly available diagnostic or therapeutic strategies and options, and their influence and specific role has now been recognised and discussed in several publications.17 47 However, it should be kept in mind that these organisations do not represent all patients, as a substantial number of patients and parents are not member of such an organisation.Professionals have to provide optimal medical care based on well-established evidence, or at least on broad consensus. Yet not everything can be regulated by recommendations and guidelines. Options, ideas and wishes should be openly discussed between professionals, patients and families within their confidential relationship.

This will enable highly individualised holistic care tailored to the patient’s needs and expectations. Once they are well-informed of all available options, parents and/or patients can choose what they consider the optimal care for their children or themselves.15 16ConclusionThe Dutch-Flemish guideline uniquely addresses some topics that are under-represented in the literature, thus adding some key aspects to those addressed in recent consensus papers and guidelines.15–17 33 47As more children with a DSD are now being identified prenatally, and the literature on prenatal diagnosis of DSD remains scarce,20 21 we propose a prenatal diagnostic algorithm and emphasise the importance of having a prenatal specialist involved in or collaborating with DSD (expert) centres.We also stress that good communication between all involved parties is essential. Professionals should be well informed about protocols and communication. Collaboration between centres is necessary to optimise aspects of care such as uniform interpretation of gonadal pathology and functional testing of class 3 variants found by genetic testing. Guidelines can provide a framework within which individualised patient care should be discussed with all stakeholders.AcknowledgmentsThe authors would like to thank the colleagues of the DSD teams for their input in and critical reading of the Dutch-Flemish guideline.

Amsterdam University Center (AMC and VU), Maastricht University Medical Center, Erasmus Medical Center Rotterdam, Radboud University Medical Center Nijmegen, University Medical Center Groningen, University Medical Center Utrecht, Ghent University Hospital. The authors would like to thank Kate McIntyre for editing the revised manuscript and Tom de Vries Lentsch for providing the figures as a PDF. Three of the authors of this publication are members of the European Reference Network for rare endocrine diseases—Project ID 739543.IntroductionEndometrial cancer is the most common gynaecological malignancy in the developed world.1 Its incidence has risen over the last two decades as a consequence of the ageing population, fewer hysterectomies for benign disease and the obesity epidemic. In the USA, it is estimated that women have a 1 in 35 lifetime risk of endometrial cancer, and in contrast to cancers of most other sites, cancer-specific mortality has risen by approximately 2% every year since 2008 related to the rapidly rising incidence.2Endometrial cancer has traditionally been classified into type I and type II based on morphology.3 The more common subtype, type I, is mostly comprised of endometrioid tumours and is oestrogen-driven, arises from a hyperplastic endometrium, presents at an early stage and has an excellent 5 year survival rate.4 By contrast, type II includes non-endometrioid tumours, specifically serous, carcinosarcoma and clear cell subtypes, which are biologically aggressive tumours with a poor prognosis that are often diagnosed at an advanced stage.5 Recent efforts have focused on a molecular classification system for more accurate categorisation of endometrial tumours into four groups with distinct prognostic profiles.6 7The majority of endometrial cancers arise through the interplay of familial, genetic and lifestyle factors. Two inherited cancer predisposition syndromes, Lynch syndrome and the much rarer Cowden syndrome, substantially increase the lifetime risk of endometrial cancer, but these only account for around 3–5% of cases.8–10 Having first or second degree relative(s) with endometrial or colorectal cancer increases endometrial cancer risk, although a large European twin study failed to demonstrate a strong heritable link.11 The authors failed to show that there was greater concordance in monozygotic than dizygotic twins, but the study was based on relatively small numbers of endometrial cancers.

Lu and colleagues reported an association between common single nucleotide polymorphisms (SNPs) and endometrial cancer risk, revealing the potential role of SNPs in explaining part of the risk in both the familial and general populations.12 Thus far, many SNPs have been reported to modify susceptibility to endometrial cancer. However, much of this work predated genome wide association studies and is of variable quality. Understanding genetic predisposition to endometrial cancer could facilitate personalised risk assessment with a view to targeted prevention and screening interventions.13 This emerged as the most important unanswered research question in endometrial cancer according to patients, carers and healthcare professionals in our recently completed James Lind Womb Cancer Alliance Priority Setting Partnership.14 It would be particularly useful for non-endometrioid endometrial cancers, for which advancing age is so far the only predictor.15We therefore conducted a comprehensive systematic review of the literature to provide an overview of the relationship between SNPs and endometrial cancer risk. We compiled a list of the most robust endometrial cancer-associated SNPs. We assessed the applicability of this panel of SNPs with a theoretical polygenic risk score (PRS) calculation.

We also critically appraised the meta-analyses investigating the most frequently reported SNPs in MDM2. Finally, we described all SNPs reported within genes and pathways that are likely involved in endometrial carcinogenesis and metastasis.MethodsOur systematic review follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) collaboration 2009 recommendations. The registered protocol is available through PROSPERO (CRD42018091907).16Search strategyWe searched Embase, MEDLINE and Cumulative Index to Nursing and Allied Health Literature (CINAHL) databases via the Healthcare Databases Advanced Search (HDAS) platform, from 2007 to 2018, to identify studies reporting associations between polymorphisms and endometrial cancer risk. Key words including MeSH (Medical Subject Heading) terms and free-text words were searched in both titles and abstracts. The following terms were used.

€œendomet*”,“uter*”, “womb”, “cancer(s)”, “neoplasm(s)”, “endometrium tumour”, “carcinoma”, “adenosarcoma”, “clear cell carcinoma”, “carcinosarcoma”, “SNP”, “single nucleotide polymorphism”, “GWAS”, and “genome-wide association study/ies”. No other restrictions were applied. The search was repeated with time restrictions between 2018 and June 2019 to capture any recent publications.Eligibility criteriaStudies were selected for full-text evaluation if they were primary articles investigating a relationship between endometrial cancer and SNPs. Study outcome was either the increased or decreased risk of endometrial cancer relative to controls reported as an odds ratio (OR) with corresponding 95% confidence intervals (95% CIs).Study selectionThree independent reviewers screened all articles uploaded to a screening spreadsheet developed by Helena VonVille.17 Disagreements were resolved by discussion. Chronbach’s α score was calculated between reviewers and indicated high consistency at 0.92.

Case–control, prospective and retrospective studies, genome-wide association studies (GWAS), and both discovery and validation studies were selected for full-text evaluation. Non-English articles, editorials, conference abstracts and proceedings, letters and correspondence, case reports and review articles were excluded.Candidate-gene studies with at least 100 women and GWAS with at least 1000 women in the case arm were selected to ensure reliability of the results, as explained by Spencer et al.18 To construct a panel of up to 30 SNPs with the strongest evidence of association, those with the strongest p values were selected. For the purpose of an SNP panel, articles utilising broad European or multi-ethnic cohorts were selected. Where overlapping populations were identified, the most comprehensive study was included.Data extraction and synthesisFor each study, the following data were extracted. SNP ID, nearby gene(s)/chromosome location, OR (95% CI), p value, minor or effect allele frequency (MAF/EAF), EA (effect allele) and OA (other allele), adjustment, ethnicity and ancestry, number of cases and controls, endometrial cancer type, and study type including discovery or validation study and meta-analysis.

For risk estimates, a preference towards most adjusted results was applied. For candidate-gene studies, a standard p value of<0.05 was applied and for GWAS a p value of <5×10-8, indicating genome-wide significance, was accepted as statistically significant. However, due to the limited number of SNPs with p values reaching genome-wide significance, this threshold was then lowered to <1×10-5, allowing for marginally significant SNPs to be included. As shown by Mavaddat et al, for breast cancer, SNPs that fall below genome-wide significance may still be useful for generating a PRS and improving the models.19We estimated the potential value of a PRS based on the most significant SNPs by comparing the predicted risk for a woman with a risk score in the top 1% of the distribution to the mean predicted risk. Per-allele ORs and MAFs were taken from the publications and standard errors (SEs) for the lnORs were derived from published 95% CIs.

The PRS was assumed to have a Normal distribution, with mean 2∑βipI and SE, σ, equal to √2∑βi2pI(1−pi), according to the binomial distribution, where the summation is over all SNPs in the risk score. Hence the relative risk (RR) comparing the top 1% of the distribution to the mean is given by exp(Z0.01σ), where Z is the inverse of the standard normal cumulative distribution.ResultsThe flow chart of study selection is illustrated in figure 1. In total, 453 text articles were evaluated and, of those, 149 articles met our inclusion criteria. One study was excluded from table 1, for having an Asian-only population, as this would make it harder to compare with the rest of the results which were all either multi-ethnic or Caucasian cohorts, as stated in our inclusion criteria for the SNP panel.20 Any SNPs without 95% CIs were also excluded from any downstream analysis. Additionally, SNPs in linkage disequilibrium (r2 >0.2) with each other were examined, and of those in linkage disequilibrium, the SNP with strongest association was reported.

Per allele ORs were used unless stated otherwise.View this table:Table 1 List of top SNPs most likely to contribute to endometrial cancer risk identified through systematic review of recent literature21–25Study selection flow diagram. *Reasons. Irrelevant articles, articles focusing on other conditions, non-GWAS/candidate-gene study related articles, technical and duplicate articles. GWAS, genome-wide association study. Adapted from.

Moher D, Liberati A, Tetzlaff J, Altman DG, The PRISMA Group (2009). Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The PRISMA Statement. PLoS Med 6(6). E1000097.

Doi:10.1371/journal.pmed1000097." data-icon-position data-hide-link-title="0">Figure 1 Study selection flow diagram. *Reasons. Irrelevant articles, articles focusing on other conditions, non-GWAS/candidate-gene study related articles, technical and duplicate articles. GWAS, genome-wide association study. Adapted from.

Moher D, Liberati A, Tetzlaff J, Altman DG, The PRISMA Group (2009). Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The PRISMA Statement. PLoS Med 6(6). E1000097.

Doi:10.1371/journal.pmed1000097.Top SNPs associated with endometrial cancer riskFollowing careful interpretation of the data, 24 independent SNPs with the lowest p values that showed the strongest association with endometrial cancer were obtained (table 1).21–25 These SNPs are located in or around genes coding for transcription factors, cell growth and apoptosis regulators, and enzymes involved in the steroidogenesis pathway. All the SNPs presented here were reported on the basis of a GWAS or in one case, an exome-wide association study, and hence no SNPs from candidate-gene studies made it to the list. This is partly due to the nature of larger GWAS providing more comprehensive and powered results as opposed to candidate gene studies. Additionally, a vast majority of SNPs reported by candidate-gene studies were later refuted by large-scale GWAS such as in the case of TERT and MDM2 variants.26 27 The exception to this is the CYP19 gene, where candidate-gene studies reported an association between variants in this gene with endometrial cancer in both Asian and broad European populations, and this association was more recently confirmed by large-scale GWAS.21 28–30 Moreover, a recent article authored by O’Mara and colleagues reviewed the GWAS that identified most of the currently known SNPs associated with endometrial cancer.31Most of the studies represented in table 1 are GWAS and the majority of these involved broad European populations. Those having a multi-ethnic cohort also consisted primarily of broad European populations.

Only four of the variants in table 1 are located in coding regions of a gene, or in regulatory flanking regions around the gene. Thus, most of these variants would not be expected to cause any functional effects on the gene or the resulting protein. An eQTL search using GTEx Portal showed that some of the SNPs are significantly associated (p<0.05) with modified transcription levels of the respective genes in various tissues such as prostate (rs11263761), thyroid (rs9668337), pituitary (rs2747716), breast mammary (rs882380) and testicular (rs2498794) tissue, as summarised in table 2.View this table:Table 2 List of eQTL hits for the selected panel of SNPsThe only variant for which there was an indication of a specific association with non-endometrioid endometrial cancer was rs148261157 near the BCL11A gene. The A allele of this SNP had a moderately higher association in the non-endometrioid arm (OR 1.64, 95% CI 1.32 to 2.04. P=9.6×10-6) compared with the endometrioid arm (OR 1.25, 95% CI 1.14 to 1.38.

P=4.7×10-6).21Oestrogen receptors α and β encoded by ESR1 and ESR2, respectively, have been extensively studied due to the assumed role of oestrogens in the development of endometrial cancer. O’Mara et al reported a lead SNP (rs79575945) in the ESR1 region that was associated with endometrial cancer (p=1.86×10-5).24 However, this SNP did not reach genome-wide significance in a more recent larger GWAS.21 No statistically significant associations have been reported between endometrial cancer and SNPs in the ESR2 gene region.AKT is an oncogene linked to endometrial carcinogenesis. It is involved in the PI3K/AKT/mTOR pro-proliferative signalling pathway to inactivate apoptosis and allow cell survival. The A allele of rs2494737 and G allele of rs2498796 were reported to be associated with increased and decreased risk of endometrial cancer in 2016, respectively.22 30 However, this association was not replicated in a larger GWAS in 2018.21 Nevertheless, given the previous strong indications, and biological basis that could explain endometrial carcinogenesis, we decided to include an AKT1 variant (rs2498794) in our results.PTEN is a multi-functional tumour suppressor gene that regulates the AKT/PKB signalling pathway and is commonly mutated in many cancers including endometrial cancer.32 Loss-of-function germline mutations in PTEN are responsible for Cowden syndrome, which exerts a lifetime risk of endometrial cancer of up to 28%.9 Lacey and colleagues studied SNPs in the PTEN gene region. However, none showed significant differences in frequency between 447 endometrial cancer cases and 439 controls of European ancestry.33KRAS mutations are known to be present in endometrial cancer.

These can be activated by high levels of KLF5 (transcriptional activator). Three SNPs have been identified in or around KLF5 that are associated with endometrial cancer. The G allele of rs11841589 (OR 1.15, 95% CI 1.11 to 1.21. P=4.83×10-11), the A allele of rs9600103 (OR 1.23, 95% CI 1.16 to 1.30. P=3.76×10-12) and C allele of rs7981863 (OR 1.16, 95% CI 1.12 to 1.20.

P=2.70×10-17) have all been found to be associated with an increased likelihood of endometrial cancer in large European cohorts.21 30 34 It is worth noting that these SNPs are not independent, and hence they quite possibly tag the same causal variant.The MYC family of proto-oncogenes encode transcription factors that regulate cell proliferation, which can contribute to cancer development if dysregulated. The recent GWAS by O’Mara et al reported three SNPs within the MYC region that reached genome-wide significance with conditional p values reaching at least 5×10–8.35To test the utility of these SNPs as predictive markers, we devised a theoretical PRS calculation using the log ORs and EAFs per SNP from the published data. The results were very encouraging with an RR of 3.16 for the top 1% versus the mean, using all the top SNPs presented in table 1 and 2.09 when using only the SNPs that reached genome-wide significance (including AKT1).Controversy surrounding MDM2 variant SNP309MDM2 negatively regulates tumour suppressor gene TP53, and as such, has been extensively studied in relation to its potential role in predisposition to endometrial cancer. Our search identified six original studies of the association between MDM2 SNP rs2279744 (also referred to as SNP309) and endometrial cancer, all of which found a statistically significant increased risk per copy of the G allele. Two more original studies were identified through our full-text evaluation.

However, these were not included here as they did not meet our inclusion criteria—one due to small sample size, the other due to studying rs2279744 status dependent on another SNP.36 37 Even so, the two studies were described in multiple meta-analyses that are listed in table 3. Different permutations of these eight original studies appear in at least eight published meta-analyses. However, even the largest meta-analysis contained <2000 cases (table 3)38View this table:Table 3 Characteristics of studies that examined MDM2 SNP rs2279744In comparison, a GWAS including nearly 13 000 cases found no evidence of an association with OR and corresponding 95% CI of 1.00 (0.97 to 1.03) and a p value of 0.93 (personal communication).21 Nevertheless, we cannot completely rule out a role for MDM2 variants in endometrial cancer predisposition as the candidate-gene studies reported larger effects in Asians, whereas the GWAS primarily contained participants of European ancestry. There is also some suggestion that the SNP309 variant is in linkage disequilibrium with another variant, SNP285, which confers an opposite effect.It is worth noting that the SNP285C/SNP309G haplotype frequency was observed in up to 8% of Europeans, thus requiring correction for the confounding effect of SNP285C in European studies.39 However, aside from one study conducted by Knappskog et al, no other study including the meta-analyses corrected for the confounding effect of SNP285.40 Among the studies presented in table 3, Knappskog et al (2012) reported that after correcting for SNP285, the OR for association of this haplotype with endometrial cancer was much lower, though still significant. Unfortunately, the meta-analyses which synthesised Knappskog et al (2012), as part of their analysis, did not correct for SNP285C in the European-based studies they included.38 41 42 It is also concerning that two meta-analyses using the same primary articles failed to report the same result, in two instances.38 42–44DiscussionThis article represents the most comprehensive systematic review to date, regarding critical appraisal of the available evidence of common low-penetrance variants implicated in predisposition to endometrial cancer.

We have identified the most robust SNPs in the context of endometrial cancer risk. Of those, only 19 were significant at genome-wide level and a further five were considered marginally significant. The largest GWAS conducted in this field was the discovery- and meta-GWAS by O’Mara et al, which utilised 12 096 cases and 108 979 controls.21 Despite the inclusion of all published GWAS and around 5000 newly genotyped cases, the total number did not reach anywhere near what is currently available for other common cancers such as breast cancer. For instance, BCAC (Breast Cancer Association Consortium) stands at well over 200 000 individuals with more than half being cases, and resulted in identification of ~170 SNPs in relation to breast cancer.19 45 A total of 313 SNPs including imputations were then used to derive a PRS for breast cancer.19 Therefore, further efforts should be directed to recruit more patients, with deep phenotypic clinical data to allow for relevant adjustments and subgroup analyses to be conducted for better precision.A recent pre-print study by Zhang and colleagues examined the polygenicity and potential for SNP-based risk prediction for 14 common cancers, including endometrial cancer, using available summary-level data from European-ancestry datasets.46 They estimated that there are just over 1000 independent endometrial cancer susceptibility SNPs, and that a PRS comprising all such SNPs would have an area under the receiver-operator curve of 0.64, similar to that predicted for ovarian cancer, but lower than that for the other cancers in the study. The modelling in the paper suggests that an endometrial cancer GWAS double the size of the current largest study would be able to identify susceptibility SNPs together explaining 40% of the genetic variance, but that in order to explain 75% of the genetic variance it would be necessary to have a GWAS comprising close to 150 000 cases and controls, far in excess of what is currently feasible.We found that the literature consists mainly of candidate-gene studies with small sample sizes, meta-analyses reporting conflicting results despite using the same set of primary articles, and multiple reports of significant SNPs that have not been validated by any larger GWAS.

The candidate-gene studies were indeed the most useful and cheaper technique available until the mid to late 2000s. However, a lack of reproducibility (particularly due to population stratification and reporting bias), uncertainty of reported associations, and considerably high false discovery rates make these studies much less appropriate in the post-GWAS era. Unlike the candidate-gene approach, GWAS do not require prior knowledge, selection of genes or SNPs, and provide vast amounts of data. Furthermore, both the genotyping process and data analysis phases have become cheaper, the latter particularly due to faster and open-access pre-phasing and imputation tools being made available.It is clear from table 1 that some SNPs were reported with wide 95% CI, which can be directly attributed to small sample sizes particularly when restricting the cases to non-endometrioid histology only, low EAF or poor imputation quality. Thus, these should be interpreted with caution.

Additionally, most of the SNPs reported by candidate-gene studies were not detected by the largest GWAS to date conducted by O’Mara et al.21 However, this does not necessarily mean that the possibility of those SNPs being relevant should be completely dismissed. Moreover, meta-analyses were attempted for other variants. However, these showed no statistically significant association and many presented with high heterogeneity between the respective studies (data not shown). Furthermore, as many studies utilised the same set of cases and/or controls, conducting a meta-analysis was not possible for a good number of SNPs. It is therefore unequivocal that the literature is crowded with numerous small candidate-gene studies and conflicting data.

This makes it particularly hard to detect novel SNPs and conduct meaningful meta-analyses.We found convincing evidence for 19 variants that indicated the strongest association with endometrial cancer, as shown in table 1. The associations between endometrial cancer and variants in or around HNF1B, CYP19A1, SOX4, MYC, KLF and EIF2AK found in earlier GWAS were then replicated in the latest and largest GWAS. These SNPs showed promising potential in a theoretical PRS we devised based on published data. Using all 24 or genome-wide significant SNPs only, women with a PRS in the top 1% of the distribution would be predicted to have a risk of endometrial cancer 3.16 and 2.09 times higher than the mean risk, respectively.However, the importance of these variants and relevance of the proximate genes in a functional or biological context is challenging to evaluate. Long distance promoter regulation by enhancers may disguise the genuine target gene.

In addition, enhancers often do not loop to the nearest gene, further complicating the relevance of nearby gene(s) to a GWAS hit. In order to elucidate biologically relevant candidate target genes in endometrial cancer, O’Mara et al looked into promoter-associated chromatin looping using a modern HiChIP approach.47 The authors utilised normal and tumoural endometrial cell lines for this analysis which showed significant enrichment for endometrial cancer heritability, with 103 candidate target genes identified across the 13 risk loci identified by the largest ECAC GWAS. Notable genes identified here were CDKN2A and WT1, and their antisense counterparts. The former was reported to be nearby of rs1679014 and the latter of rs10835920, as shown in table 1. Moreover, of the 36 candidate target genes, 17 were found to be downregulated while 19 were upregulated in endometrial tumours.The authors also investigated overlap between the 13 endometrial cancer risk loci and top eQTL variants for each target gene.47 In whole blood, of the two particular lead SNPs, rs8822380 at 17q21.32 was a top eQTL for SNX11 and HOXB2, whereas rs937213 at 15q15.1 was a top eQTL for SRP14.

In endometrial tumour, rs7579014 at 2p16.1 was found to be a top eQTL for BCL11A. This is particularly interesting because BCL11A was the only nearby/candidate gene that had a GWAS association reported in both endometrioid and non-endometrioid subtypes. The study looked at protein–protein interactions between endometrial cancer drivers and candidate target gene products. Significant interactions were observed with TP53 (most significant), AKT, PTEN, ESR1 and KRAS, among others. Finally, when 103 target candidate genes and 387 proteins were combined together, 462 pathways were found to be significantly enriched.

Many of these are related to gene regulation, cancer, obesity, insulinaemia and oestrogen exposure. This study clearly showed a potential biological relevance for some of the SNPs reported by ECAC GWAS in 2018.Most of the larger included studies used cohorts primarily composed of women of broad European descent. Hence, there are negligible data available for other ethnicities, particularly African women. This is compounded by the lack of reference genotype data available for comparative analysis, making it harder for research to be conducted in ethnicities other than Europeans. This poses a problem for developing risk prediction models that are equally valuable and predictive across populations.

Thus, our results also are of limited applicability to non-European populations.Furthermore, considering that non-endometrioid cases comprise a small proportion (~20%) of all endometrial cancer cases, much larger cohort sizes are needed to detect any genuine signals for non-endometrioid tumours. Most of the evaluated studies looked at either overall/mixed endometrial cancer subtypes or endometrioid histology, and those that looked at variant associations with non-endometrioid histology were unlikely to have enough power to detect any signal with statistical significance. This is particularly concerning because non-endometrioid subtypes are biologically aggressive tumours with a much poorer prognosis that contribute disproportionately to mortality from endometrial cancer. It is particularly important that attempts to improve early detection and prevention of endometrial cancer focus primarily on improving outcomes from these subtypes. It is also worth noting that, despite the current shift towards a molecular classification of endometrial cancer, most studies used the overarching classical Bokhman’s classification system, type I versus type II, or no histological classification system at all.

Therefore, it is important to create and follow a standardised and comprehensive classification system for reporting tumour subtypes for future studies.This study compiled and presented available information for an extensively studied, yet unproven in large datasets, SNP309 variant in MDM2. Currently, there is no convincing evidence for an association between this variant and endometrial cancer risk. Additionally, of all the studies, only one accounted for the opposing effect of a nearby variant SNP285 in their analyses. Thus, we conclude that until confirmed by a sufficiently large GWAS, this variant should not be considered significant in influencing the risk of endometrial cancer and therefore not included in a PRS. This is also true for the majority of the SNPs reported in candidate-gene studies, as the numbers fall far short of being able to detect genuine signals.This systematic review presents the most up-to-date evidence for endometrial cancer susceptibility variants, emphasising the need for further large-scale studies to identify more variants of importance, and validation of these associations.

Until data from larger and more diverse cohorts are available, the top 24 SNPs presented here are the most robust common genetic variants that affect endometrial cancer risk. The multiplicative effects of these SNPs could be used in a PRS to allow personalised risk prediction models to be developed for targeted screening and prevention interventions for women at greatest risk of endometrial cancer..

IntroductionIn recent years, many studies have been published on new diagnostic possibilities and management approaches in cohorts of patients suspected to have Purchase zithromax a disorder/difference of sex development (DSD).1–13 Based on these studies, it has become clear that services and institutions still differ in the composition of the multidisciplinary teams that provide care for patients who have a DSD.11 14 Several projects have can you buy over the counter zithromax now worked to resolve this variability in care. The European Cooperation in Science and Technology (EU COST) action BM1303 ‘A systematic elucidation of differences of sex development’ has been a platform to achieve European agreement on harmonisation of can you buy over the counter zithromax clinical management and laboratory practices.15–17 Another such initiative involved an update of the 2006 DSD consensus document by an international group of professionals and patient representatives.18 These initiatives have highlighted how cultural and financial aspects and the availability of resources differ significantly between countries and societies, a situation that hampers supranational agreement on common diagnostic protocols. As only a few national guidelines have been published in international journals, comparison of these guidelines is difficult even though such a comparison is necessary to capture the differences and initiate actions to overcome them. Nonetheless, four DSD (expert) centres located in the Netherlands and Flanders (the Dutch-speaking Northern part of Belgium) can you buy over the counter zithromax have collaborated to produce a detailed guideline on diagnostics in DSD.19 This shows that a supranational guideline can be a reasonable approach for countries with similarly structured healthcare systems and similar resources.

Within the guideline there is agreement that optimisation of expertise and care can be achieved through centralisation, for example, by limiting analysis of next-generation sequencing (NGS)-based diagnostic panels to only a few centres and by centralising pathological review of gonadal tissues. International networks such as the can you buy over the counter zithromax European Reference Network for rare endocrine conditions (EndoERN), in which DSD is embedded, may facilitate the expansion of this kind of collaboration across Europe.This paper highlights key discussion points in the Dutch-Flemish guideline that have been insufficiently addressed in the literature thus far because they reflect evolving technologies or less visible stakeholders. For example, prenatal observation of an atypical aspect of the genitalia indicating a possible DSD is becoming increasingly common, and we discuss appropriate counselling and a diagnostic approach for these cases, including the option of using NGS-based genetic testing. So far, little attention has been can you buy over the counter zithromax paid to this process.20 21 Furthermore, informing patients and/or their parents about atypical sex development and why this may warrant referral to a specialised team may be challenging, especially for professionals with limited experience in DSD.22 23 Therefore, a section of the Dutch-Flemish guideline was written for these healthcare providers.

Moreover, this enables DSD specialists to refer to the guideline when advising a referral. Transition from the prenatal to the postnatal team can you buy over the counter zithromax and from the paediatric to the adult team requires optimal communication between the specialists involved. Application of NGS-based techniques may lead to a higher diagnostic yield, providing a molecular genetic diagnosis in previously unsolved cases.16 We address the timing of this testing and the problems associated with this technique such as the interpretation of variants of unknown clinical significance (VUS). Similarly, histopathological interpretation and classification of removed gonadal tissue is challenging and would benefit from international collaboration and centralisation of expertise.MethodsFor the guideline revision, an interdisciplinary multicentre can you buy over the counter zithromax group was formed with all members responsible for updating the literature for a specific part of the guideline.

Literature search in PubMed was not systematic, but rather intended to be broad in order to cover all areas and follow expert opinions. This approach is more in line with the can you buy over the counter zithromax Clinical Practice Advisory Document method described by Burke et al24 for guidelines involving genetic practice because it is often troublesome to substantiate such guidelines with sufficient evidence due to the rapid changes in testing methods, for example, gene panels. All input provided by the group was synthesised by the chairperson (YvB), who also reviewed abstracts of papers on DSD published between 2010 and September 2017 for the guideline and up to October 2019 for this paper. Abstracts had can you buy over the counter zithromax to be written in English and were identified using a broad range of Medical Subject Headings terms (eg, DSD, genetic, review, diagnosis, diagnostics, 46,XX DSD, 46,XY DSD, guideline, multidisciplinary care).

Next, potentially relevant papers on diagnostic procedures in DSD were selected. Case reports were excluded, as were articles that were not open access or retrievable through can you buy over the counter zithromax institutional access. Based on this, a draft guideline was produced that was in line with the international principles of good diagnostic care in DSD. This draft was discussed can you buy over the counter zithromax by the writing committee and, after having obtained agreement on remaining points of discussion, revised into a final draft.

This version was sent to a broad group of professionals from academic centres and DSD teams whose members had volunteered to review the draft guideline. After receiving and incorporating their input, the final version was presented to the paediatric and can you buy over the counter zithromax genetic associations for approval. After approval by the members of the paediatric (NVK), clinical genetic (VKGN) and genetic laboratory (VKGL) associations, the guideline was published on their respective websites.19 Although Turner syndrome and Klinefelter syndrome are considered to be part of the DSD spectrum, they are not extensively discussed in this diagnostic guideline as guidelines dedicated to these syndromes already exist.25 26 However, some individuals with Turner syndrome or Klinefelter syndrome may present with ambiguous or atypical genitalia and may therefore initially follow the DSD diagnostic process.Guideline highlightsPrenatal settingPresentationThe most frequent prenatal presentation of a DSD condition is atypical genitalia found on prenatal ultrasound as an isolated finding or in combination with other structural anomalies. This usually occurs after the 20-week routine medical ultrasound for screening of congenital anomalies, but may also occur earlier, for example, when a commercial ultrasound is performed at the request of the parents.Another way DSD can be diagnosed before birth is when invasive prenatal genetic testing carried out for a different reason, for example, due to can you buy over the counter zithromax suspicion of other structural anomalies, reveals a discrepancy between the genotypic sex and the phenotypic sex seen by ultrasound.

In certified laboratories, the possibility of a sample switch is extremely low but should be ruled out immediately. More often, the discrepancy will be due to sex-chromosome mosaicism or a true form of DSD.A situation now occurring with increasing frequency is a discrepancy between the genotypic sex revealed by non-invasive prenatal testing (NIPT), which is now available to high-risk pregnant women in the Netherlands and to all pregnant women can you buy over the counter zithromax in Belgium, and later ultrasound findings. NIPT screens for CNVs in the fetus. However, depending on legal restrictions and/or can you buy over the counter zithromax ethical considerations, the X and Y chromosomes are not always included in NIPT analysis and reports.

If the X and Y chromosomes are included, it is important to realise that the presence of a Y-chromosome does not necessarily imply male fetal development. At the time that NIPT is performed (usually 11–13 weeks), genital development cannot be reliably appreciated by ultrasound, so any discrepancy or atypical aspect of the genitalia will only be noticed later in pregnancy and should prompt further evaluation.Counselling and diagnosticsIf a DSD is suspected, first-line sonographers and obstetricians should refer the couple to their colleague can you buy over the counter zithromax prenatal specialists working with or in a DSD team. After confirming an atypical genital on ultrasound, the specialist team should offer the couple a referral for genetic counselling to discuss the possibility of performing invasive prenatal testing (usually an amniocentesis) to identify an underlying cause that fits the ultrasound findings.22 23 To enable the parents to make a well-informed decision, prenatal counselling should, in our opinion, include. Information on the can you buy over the counter zithromax ultrasound findings and the limitations of this technique.

The procedure(s) that can be followed, including the risks associated with an amniocentesis. And the can you buy over the counter zithromax type of information genetic testing can and cannot provide. Knowing which information has been provided and what words have been used by the prenatal specialist is very helpful for those involved in postnatal care.It is important that parents understand that the biological sex of a baby is determined by a complex interplay of chromosomes, genes and hormones, and thus that assessment of the presence or absence of a Y-chromosome alone is insufficient to assign the sex of their unborn child or, as in any unborn child, say anything about the child’s future gender identity.Expecting parents can be counselled by the clinical geneticist and the psychologist from the DSD team, although other DSD specialists can also be involved. The clinical geneticist should be experienced in prenatal counselling and can you buy over the counter zithromax well informed about the diagnostic possibilities given the limited time span in which test results need to be available to allow parents to make a well-informed decision about whether or not to continue the pregnancy.

Termination of pregnancy can be considered, for instance, in a syndromic form of DSD with multiple malformations, but when the DSD occurs as an apparently isolated condition, expecting parents may also consider termination of pregnancy, which, although considered controversial can you buy over the counter zithromax by some, is legal in Belgium and the Netherlands. The psychologist of the DSD team can support parents during and after pregnancy and help them cope with feelings of uncertainty and eventual considerations of a termination of pregnancy, as well as with practical issues, for example, how to inform others. The stress of not knowing exactly what the child’s genitalia will look like and uncertainty about the diagnosis, treatment and prognosis cannot be avoided completely can you buy over the counter zithromax. Parents are informed that if the postnatal phenotype is different from what was prenatally expected, the advice given about diagnostic testing can be adjusted accordingly, for example, if a hypospadias is milder than was expected based on prenatal ultrasound images.

In our experience, parents appreciate having already spoken can you buy over the counter zithromax to some members of the DSD team during pregnancy and having a contact person before birth.After expert prenatal counselling, a significant number of pregnant couples decline prenatal testing (personal experience IALG, MK, ABD, YvB, MC and HC-vdG). At birth, umbilical cord blood is a good source for (molecular) karyotyping and storage of DNA and can be obtained by the obstetrician, midwife or neonatologist. The terminology used in communication with parents should be carefully chosen,22 23 and midwives and staff of neonatal and delivery units should be clearly instructed to use gender-neutral and non-stigmatising vocabulary (eg, ‘your baby’) as long as sex assignment is can you buy over the counter zithromax pending.An algorithm for diagnostic evaluation of a suspected DSD in the prenatal situation is proposed in figure 1. When couples opt for invasive prenatal diagnosis, the genetic analysis usually involves an (SNP)-array.

It was recently estimated that >30% of individuals who have a DSD have additional structural anomalies, can you buy over the counter zithromax with cardiac and neurological anomalies and fetal growth restriction being particularly common.27 28 If additional anomalies are seen, the geneticist can consider specific gene defects that may underlie a known genetic syndrome or carry out NGS. NGS-based techniques have also now made their appearance in prenatal diagnosis of congenital anomalies.29 30 Panels using these techniques can be specific for genes involved in DSD, or be larger panels covering multiple congenital anomalies, and are usually employed with trio-analysis to compare variants identified in the child with the parents’ genetics.29–31 Finding a genetic cause before delivery can help reduce parental stress in the neonatal period and speed up decisions regarding gender assignment. In such cases there is no tight time limit, and we propose completing the analysis well before the expected delivery.Disorders/differences of can you buy over the counter zithromax sex development (DSD) in the prenatal setting. A diagnostic algorithm.

*SOX9. Upstream anomalies and balanced translocations at promotor sites!. Conventional karyotyping can be useful. NGS, next-generation sequencing." data-icon-position data-hide-link-title="0">Figure 1 Disorders/differences of sex development (DSD) in the prenatal setting.

A diagnostic algorithm. *SOX9. Upstream anomalies and balanced translocations at promotor sites!. Conventional karyotyping can be useful.

NGS, next-generation sequencing.First contact by a professional less experienced in DSDWhereas most current guidelines start from the point when an individual has been referred to the DSD team,1 15 the Dutch-Flemish guideline dedicates a chapter to healthcare professionals less experienced in DSD as they are often the first to suspect or identify such a condition. Apart from the paper of Indyk,7 little guidance is available for these professionals about how to act in such a situation. The chapter in the Dutch-Flemish guideline summarises the various clinical presentations that a DSD can have and provides information on how to communicate with parents and/or patients about the findings of the physical examination, the first-line investigations and the need for prompt referral to a specialised centre for further evaluation. Clinical examples are offered to illustrate some of these recurring situations.

The medical issues in DSD can be very challenging, and the social and psychological impact is high. For neonates with ambiguous genitalia, sex assignment is an urgent and crucial issue, and it is mandatory that parents are informed that it is possible to postpone registration of their child’s sex. In cases where sex assignment has already taken place, the message that the development of the gonads or genitalia is still atypical is complicated and distressing for patients and parents or carers. A list of contact details for DSD centres and patient organisations in the Netherlands and Flanders is attached to the Dutch-Flemish guideline.

Publishing such a list, either in guidelines or online, can help healthcare professionals find the nearest centres for consultations and provide patients and patient organisations with an overview of the centres where expertise is available.Timing and place of genetic testing using NGS-based gene panelsThe diagnostic workup that is proposed for 46,XX and 46,XY DSD is shown in figures 2 and 3, respectively. Even with the rapidly expanding molecular possibilities, a (family) history and a physical examination remain the essential first steps in the diagnostic process. Biochemical and hormonal screening aim at investigating serum electrolytes, renal function and the hypothalamic-pituitary-gonadal and hypothalamic-pituitary-adrenal axes. Ultrasound screening of kidneys and internal genitalia, as well as establishing genotypic sex, should be accomplished within 48 hours and complete the baseline diagnostic work-up of a child born with ambiguous genitalia.1 16 32 3346,XX disorders/differences of sex development (DSD) in the postnatal setting.

A diagnostic algorithm. NGS, next-generation sequencing. CAH, Congenital adrenal hyperplasia. AMH, Anti-Müllerian Hormone." data-icon-position data-hide-link-title="0">Figure 2 46,XX disorders/differences of sex development (DSD) in the postnatal setting.

A diagnostic algorithm. NGS, next-generation sequencing. CAH, Congenital adrenal hyperplasia. AMH, Anti-Müllerian Hormone.46,XY disorders/differences of sex development (DSD) in the postnatal setting.

A diagnostic algorithm. * SOX9. Upstream anomalies and balanced translocations at promotor sites!. Conventional karyotyping can be useful.

NGS, next-generation sequencing." data-icon-position data-hide-link-title="0">Figure 3 46,XY disorders/differences of sex development (DSD) in the postnatal setting. A diagnostic algorithm. *SOX9. Upstream anomalies and balanced translocations at promotor sites!.

Conventional karyotyping can be useful. NGS, next-generation sequencing.Very recently, a European position paper has been published focusing on the genetic workup of DSD.16 It highlights the limitations and drawbacks of NGS-based tests, which include the chance of missing subtle structural variants such as CNVs and mosaicism and the fact that NGS cannot detect methylation defects or other epigenetic changes.16 28 31 Targeted DNA analysis is preferred in cases where hormonal investigations suggest a block in steroidogenesis (eg, 11-β-hydroxylase deficiency, 21-hydroxylase deficiency), or in the context of a specific clinical constellation such as the often coincidental finding of Müllerian structures in a boy with normal external genitalia or cryptorchidism, that is, persistent Müllerian duct syndrome.33 34 Alternative tests should also be considered depending on the available information. Sometimes, a simple mouth swab for FISH analysis can detect mosaic XY/X in a male with hypospadias or asymmetric gonadal development or in a female with little or no Turner syndrome stigmata and a normal male molecular karyotyping profile or peripheral blood karyotype. Such targeted testing avoids incidental findings and is cheaper and faster than analysis of a large NGS-based panel, although the cost difference is rapidly declining.However, due to the genetic and phenotypic heterogeneity of DSD conditions, the most cost-effective next steps in the majority of cases are whole exome sequencing followed by panel analysis of genes involved in genital development and function or trio-analysis of a large gene panel (such as a Mendeliome).16 35–38 Pretest genetic counselling involves discussing what kind of information will be reported to patients or parents and the chance of detecting VUS, and the small risk of incidental findings when analysing a DSD panel should be mentioned.

Laboratories also differ in what class of variants they report.39 In our experience, the fear of incidental findings is a major reason why some parents refrain from genetic testing.Timing of the DSD gene panel analysis is also important. While some patients or parents prefer that all diagnostic procedures be performed as soon as possible, others need time to reflect on the complex information related to more extensive genetic testing and on its possible consequences. If parents or patients do not consent to panel-based genetic testing, analysis of specific genes, such as WT1, should be considered when appropriate in view of the clinical consequences if a mutation is present (eg, clinical surveillance of renal function and screening for Wilms’ tumour in the case of WT1 mutations). Genes that are more frequently involved in DSD (eg, SRY, NR5A1) and that match the specific clinical and hormonal features in a given patient could also be considered for sequencing.

Targeted gene analysis may also be preferred in centres located in countries that do not have the resources or technical requirements to perform NGS panel-based genetic testing. Alternatively, participation by these centres in international collaborative networks may allow them to outsource the molecular genetic workup abroad.Gene panels differ between centres and are regularly updated based on scientific progress. A comparison of DSD gene panels used in recent studies can be found at https://www.nature.com/articles/s41574-018-0010-8%23Sec46.15 The panels currently used at the coauthors’ institutions can be found on their respective websites. Given the pace of change, it is important to regularly consider repeating analysis in patients with an unexplained DSD, for example, when they transition into adult care or when they move from one centre to another.

This also applies to patients in whom a clinical diagnosis has never been genetically confirmed. Confusion may arise when the diagnosis cannot be confirmed or when a mutation is identified in a different gene, for example, NR5A1 in someone with a clinical diagnosis of CAIS that has other consequences for relatives. Hence, new genetic counselling should always accompany new diagnostic endeavours.Class 3 variants and histopathological examinationsThe rapidly evolving diagnostic possibilities raise new questions. What do laboratories report?.

How should we deal with the frequent findings of mainly unique VUS or class 3 variants (ACMG recommendation) in the many different DSD-related genes in the diagnostic setting?. Reporting VUS can be a source of uncertainty for parents, but not reporting these variants precludes further investigations to determine their possible pathogenicity. It can also be difficult to prove variant pathogenicity, both on gene-level and variant-level.39 Moreover, given the gonad-specific expression of some genes and the variable phenotypic spectrum and reduced penetrance, segregation analysis is not always informative. A class 3 variant that does not fit the clinical presentation may be unrelated to the observed phenotype, but it could also represent a newly emerging phenotype.

This was recently demonstrated by the identification of the NR5A1 mutation, R92W, in individuals with 46,XX testicular and ovotesticular DSD.40 This gene had previously been associated with 46,XY DSD. In diagnostic laboratories, there is usually no capacity or expertise to conduct large-scale functional studies to determine pathogenicity of these unique class 3 VUS in the different genes involved in DSD. Functional validation of variants identified in novel genes may be more attractive in a research context. However, for individual families with VUS in well-established DSD genes such as AR or HSD17B3, functional analysis may provide a confirmed diagnosis that implies for relatives the option of undergoing their own DNA analysis and estimating the genetic risk of their own future offspring.

This makes genetic follow-up important in these cases and demonstrates the usefulness of international databases and networks and the centralisation of functional studies of genetic variants in order to reduce costs and maximise expertise.The same is true for histopathological description, germ-cell tumour risk assessment in specific forms of DSD and classification of gonadal samples. Germ-cell tumour risk is related to the type of DSD (among other factors), but it is impossible to make risk estimates in individual cases.41–44 Gonadectomy may be indicated in cases with high-risk dysgenetic abdominal gonads that cannot be brought into a stable superficial (ie, inguinal, labioscrotal) position that allows clinical or radiological surveillance, or to avoid virilisation due to 5-alpha reductase deficiency in a 46,XY girl with a stable female gender identity.45 Pathological examination of DSD gonads requires specific expertise. For example, the differentiation between benign germ cell abnormalities, such as delayed maturation and (pre)malignant development of germ cells, is crucial for clinical management but can be very troublesome.46 Centralised pathological examination of gonadal biopsy and gonadectomy samples in one centre, or a restricted number of centres, on a national scale can help to overcome the problem of non-uniform classification and has proven feasible in the Netherlands and Belgium. We therefore believe that uniform assessment and classification of gonadal differentiation patterns should also be addressed in guidelines on DSD management.International databases of gonadal tissues are crucial for learning more about the risk of malignancy in different forms of DSD, but they are only reliable if uniform criteria for histological classification are strictly applied.46 These criteria could be incorporated in many existing networks such as the I-DSD consortium, the Disorders of Sex Development Translational Research Network, the European Reference Network on Urogenital Diseases (eUROGEN), the EndoERN and COST actions.15–17 47Communication at the transition from paediatric to adult carePaediatric and adult teams need to collaborate closely to facilitate a well-organised transition from paediatric to adult specialist care.15 48–50 Both teams need to exchange information optimally and should consider transition as a longitudinal process rather than a fixed moment in time.

Age-appropriate information is key at all ages, and an overview of topics to be discussed at each stage is described by Cools et al.15 Table 1 shows an example of how transition can be organised.View this table:Table 1 Example of transition table as used in the DSD clinic of the Erasmus Medical CenterPsychological support and the continued provision of information remains important for individuals with a DSD at all ages.15 22 In addition to the information given by the DSD team members, families and patients can benefit from resources such as support groups and information available on the internet.47 Information available online should be checked for accuracy and completeness when referring patients and parents to internet sites.Recommendations for future actionsMost guidelines and articles on the diagnosis and management of DSD are aimed at specialists and are only published in specialist journals or on websites for endocrinologists, urologists or geneticists. Yet there is a need for guidelines directed towards first-line and second-line healthcare workers that summarise the recommendations about the first crucial steps in the management of DSD. These should be published in widely available general medical journals and online, along with a national list of DSD centres. Furthermore, DSD (expert) centres should provide continuous education to all those who may be involved in the identification of individuals with a DSD in order to enable these healthcare professionals to recognise atypical genitalia, to promptly refer individuals who have a DSD and to inform the patient and parents about this and subsequent diagnostic procedures.As DSD continues to be a rare condition, it will take time to evaluate the effects of having such a guideline on the preparedness of first-line and second-line healthcare workers to recognise DSD conditions.

One way to evaluate this might be the development and use of questionnaires asking patients, carers and families and referring physicians how satisfied they were with the initial medical consultation and referral and what could be improved. A helpful addition to existing international databases that collect information on genetic variations would be a list of centres that offer suitable functional studies for certain genes, ideally covering the most frequently mutated genes (at minimum).Patient organisations can also play an important role in informing patients about newly available diagnostic or therapeutic strategies and options, and their influence and specific role has now been recognised and discussed in several publications.17 47 However, it should be kept in mind that these organisations do not represent all patients, as a substantial number of patients and parents are not member of such an organisation.Professionals have to provide optimal medical care based on well-established evidence, or at least on broad consensus. Yet not everything can be regulated by recommendations and guidelines. Options, ideas and wishes should be openly discussed between professionals, patients and families within their confidential relationship.

This will enable highly individualised holistic care tailored to the patient’s needs and expectations. Once they are well-informed of all available options, parents and/or patients can choose what they consider the optimal care for their children or themselves.15 16ConclusionThe Dutch-Flemish guideline uniquely addresses some topics that are under-represented in the literature, thus adding some key aspects to those addressed in recent consensus papers and guidelines.15–17 33 47As more children with a DSD are now being identified prenatally, and the literature on prenatal diagnosis of DSD remains scarce,20 21 we propose a prenatal diagnostic algorithm and emphasise the importance of having a prenatal specialist involved in or collaborating with DSD (expert) centres.We also stress that good communication between all involved parties is essential. Professionals should be well informed about protocols and communication. Collaboration between centres is necessary to optimise aspects of care such as uniform interpretation of gonadal pathology and functional testing of class 3 variants found by genetic testing.

Guidelines can provide a framework within which individualised patient care should be discussed with all stakeholders.AcknowledgmentsThe authors would like to thank the colleagues of the DSD teams for their input in and critical reading of the Dutch-Flemish guideline. Amsterdam University Center (AMC and VU), Maastricht University Medical Center, Erasmus Medical Center Rotterdam, Radboud University Medical Center Nijmegen, University Medical Center Groningen, University Medical Center Utrecht, Ghent University Hospital. The authors would like to thank Kate McIntyre for editing the revised manuscript and Tom de Vries Lentsch for providing the figures as a PDF. Three of the authors of this publication are members of the European Reference Network for rare endocrine diseases—Project ID 739543.IntroductionEndometrial cancer is the most common gynaecological malignancy in the developed world.1 Its incidence has risen over the last two decades as a consequence of the ageing population, fewer hysterectomies for benign disease and the obesity epidemic.

In the USA, it is estimated that women have a 1 in 35 lifetime risk of endometrial cancer, and in contrast to cancers of most other sites, cancer-specific mortality has risen by approximately 2% every year since 2008 related to the rapidly rising incidence.2Endometrial cancer has traditionally been classified into type I and type II based on morphology.3 The more common subtype, type I, is mostly comprised of endometrioid tumours and is oestrogen-driven, arises from a hyperplastic endometrium, presents at an early stage and has an excellent 5 year survival rate.4 By contrast, type II includes non-endometrioid tumours, specifically serous, carcinosarcoma and clear cell subtypes, which are biologically aggressive tumours with a poor prognosis that are often diagnosed at an advanced stage.5 Recent efforts have focused on a molecular classification system for more accurate categorisation of endometrial tumours into four groups with distinct prognostic profiles.6 7The majority of endometrial cancers arise through the interplay of familial, genetic and lifestyle factors. Two inherited cancer predisposition syndromes, Lynch syndrome and the much rarer Cowden syndrome, substantially increase the lifetime risk of endometrial cancer, but these only account for around 3–5% of cases.8–10 Having first or second degree relative(s) with endometrial or colorectal cancer increases endometrial cancer risk, although a large European twin study failed to demonstrate a strong heritable link.11 The authors failed to show that there was greater concordance in monozygotic than dizygotic twins, but the study was based on relatively small numbers of endometrial cancers. Lu and colleagues reported an association between common single nucleotide polymorphisms (SNPs) and endometrial cancer risk, revealing the potential role of SNPs in explaining part of the risk in both the familial and general populations.12 Thus far, many SNPs have been reported to modify susceptibility to endometrial cancer. However, much of this work predated genome wide association studies and is of variable quality.

Understanding genetic predisposition to endometrial cancer could facilitate personalised risk assessment with a view to targeted prevention and screening interventions.13 This emerged as the most important unanswered research question in endometrial cancer according to patients, carers and healthcare professionals in our recently completed James Lind Womb Cancer Alliance Priority Setting Partnership.14 It would be particularly useful for non-endometrioid endometrial cancers, for which advancing age is so far the only predictor.15We therefore conducted a comprehensive systematic review of the literature to provide an overview of the relationship between SNPs and endometrial cancer risk. We compiled a list of the most robust endometrial cancer-associated SNPs. We assessed the applicability of this panel of SNPs with a theoretical polygenic risk score (PRS) calculation. We also critically appraised the meta-analyses investigating the most frequently reported SNPs in MDM2.

Finally, we described all SNPs reported within genes and pathways that are likely involved in endometrial carcinogenesis and metastasis.MethodsOur systematic review follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) collaboration 2009 recommendations. The registered protocol is available through PROSPERO (CRD42018091907).16Search strategyWe searched Embase, MEDLINE and Cumulative Index to Nursing and Allied Health Literature (CINAHL) databases via the Healthcare Databases Advanced Search (HDAS) platform, from 2007 to 2018, to identify studies reporting associations between polymorphisms and endometrial cancer risk. Key words including MeSH (Medical Subject Heading) terms and free-text words were searched in both titles and abstracts. The following terms were used.

€œendomet*”,“uter*”, “womb”, “cancer(s)”, “neoplasm(s)”, “endometrium tumour”, “carcinoma”, “adenosarcoma”, “clear cell carcinoma”, “carcinosarcoma”, “SNP”, “single nucleotide polymorphism”, “GWAS”, and “genome-wide association study/ies”. No other restrictions were applied. The search was repeated with time restrictions between 2018 and June 2019 to capture any recent publications.Eligibility criteriaStudies were selected for full-text evaluation if they were primary articles investigating a relationship between endometrial cancer and SNPs. Study outcome was either the increased or decreased risk of endometrial cancer relative to controls reported as an odds ratio (OR) with corresponding 95% confidence intervals (95% CIs).Study selectionThree independent reviewers screened all articles uploaded to a screening spreadsheet developed by Helena VonVille.17 Disagreements were resolved by discussion.

Chronbach’s α score was calculated between reviewers and indicated high consistency at 0.92. Case–control, prospective and retrospective studies, genome-wide association studies (GWAS), and both discovery and validation studies were selected for full-text evaluation. Non-English articles, editorials, conference abstracts and proceedings, letters and correspondence, case reports and review articles were excluded.Candidate-gene studies with at least 100 women and GWAS with at least 1000 women in the case arm were selected to ensure reliability of the results, as explained by Spencer et al.18 To construct a panel of up to 30 SNPs with the strongest evidence of association, those with the strongest p values were selected. For the purpose of an SNP panel, articles utilising broad European or multi-ethnic cohorts were selected.

Where overlapping populations were identified, the most comprehensive study was included.Data extraction and synthesisFor each study, the following data were extracted. SNP ID, nearby gene(s)/chromosome location, OR (95% CI), p value, minor or effect allele frequency (MAF/EAF), EA (effect allele) and OA (other allele), adjustment, ethnicity and ancestry, number of cases and controls, endometrial cancer type, and study type including discovery or validation study and meta-analysis. For risk estimates, a preference towards most adjusted results was applied. For candidate-gene studies, a standard p value of<0.05 was applied and for GWAS a p value of <5×10-8, indicating genome-wide significance, was accepted as statistically significant.

However, due to the limited number of SNPs with p values reaching genome-wide significance, this threshold was then lowered to <1×10-5, allowing for marginally significant SNPs to be included. As shown by Mavaddat et al, for breast cancer, SNPs that fall below genome-wide significance may still be useful for generating a PRS and improving the models.19We estimated the potential value of a PRS based on the most significant SNPs by comparing the predicted risk for a woman with a risk score in the top 1% of the distribution to the mean predicted risk. Per-allele ORs and MAFs were taken from the publications and standard errors (SEs) for the lnORs were derived from published 95% CIs. The PRS was assumed to have a Normal distribution, with mean 2∑βipI and SE, σ, equal to √2∑βi2pI(1−pi), according to the binomial distribution, where the summation is over all SNPs in the risk score.

Hence the relative risk (RR) comparing the top 1% of the distribution to the mean is given by exp(Z0.01σ), where Z is the inverse of the standard normal cumulative distribution.ResultsThe flow chart of study selection is illustrated in figure 1. In total, 453 text articles were evaluated and, of those, 149 articles met our inclusion criteria. One study was excluded from table 1, for having an Asian-only population, as this would make it harder to compare with the rest of the results which were all either multi-ethnic or Caucasian cohorts, as stated in our inclusion criteria for the SNP panel.20 Any SNPs without 95% CIs were also excluded from any downstream analysis. Additionally, SNPs in linkage disequilibrium (r2 >0.2) with each other were examined, and of those in linkage disequilibrium, the SNP with strongest association was reported.

Per allele ORs were used unless stated otherwise.View this table:Table 1 List of top SNPs most likely to contribute to endometrial cancer risk identified through systematic review of recent literature21–25Study selection flow diagram. *Reasons. Irrelevant articles, articles focusing on other conditions, non-GWAS/candidate-gene study related articles, technical and duplicate articles. GWAS, genome-wide association study.

Adapted from. Moher D, Liberati A, Tetzlaff J, Altman DG, The PRISMA Group (2009). Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The PRISMA Statement.

PLoS Med 6(6). E1000097. Doi:10.1371/journal.pmed1000097." data-icon-position data-hide-link-title="0">Figure 1 Study selection flow diagram. *Reasons.

Irrelevant articles, articles focusing on other conditions, non-GWAS/candidate-gene study related articles, technical and duplicate articles. GWAS, genome-wide association study. Adapted from. Moher D, Liberati A, Tetzlaff J, Altman DG, The PRISMA Group (2009).

Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The PRISMA Statement. PLoS Med 6(6). E1000097.

Doi:10.1371/journal.pmed1000097.Top SNPs associated with endometrial cancer riskFollowing careful interpretation of the data, 24 independent SNPs with the lowest p values that showed the strongest association with endometrial cancer were obtained (table 1).21–25 These SNPs are located in or around genes coding for transcription factors, cell growth and apoptosis regulators, and enzymes involved in the steroidogenesis pathway. All the SNPs presented here were reported on the basis of a GWAS or in one case, an exome-wide association study, and hence no SNPs from candidate-gene studies made it to the list. This is partly due to the nature of larger GWAS providing more comprehensive and powered results as opposed to candidate gene studies. Additionally, a vast majority of SNPs reported by candidate-gene studies were later refuted by large-scale GWAS such as in the case of TERT and MDM2 variants.26 27 The exception to this is the CYP19 gene, where candidate-gene studies reported an association between variants in this gene with endometrial cancer in both Asian and broad European populations, and this association was more recently confirmed by large-scale GWAS.21 28–30 Moreover, a recent article authored by O’Mara and colleagues reviewed the GWAS that identified most of the currently known SNPs associated with endometrial cancer.31Most of the studies represented in table 1 are GWAS and the majority of these involved broad European populations.

Those having a multi-ethnic cohort also consisted primarily of broad European populations. Only four of the variants in table 1 are located in coding regions of a gene, or in regulatory flanking regions around the gene. Thus, most of these variants would not be expected to cause any functional effects on the gene or the resulting protein. An eQTL search using GTEx Portal showed that some of the SNPs are significantly associated (p<0.05) with modified transcription levels of the respective genes in various tissues such as prostate (rs11263761), thyroid (rs9668337), pituitary (rs2747716), breast mammary (rs882380) and testicular (rs2498794) tissue, as summarised in table 2.View this table:Table 2 List of eQTL hits for the selected panel of SNPsThe only variant for which there was an indication of a specific association with non-endometrioid endometrial cancer was rs148261157 near the BCL11A gene.

The A allele of this SNP had a moderately higher association in the non-endometrioid arm (OR 1.64, 95% CI 1.32 to 2.04. P=9.6×10-6) compared with the endometrioid arm (OR 1.25, 95% CI 1.14 to 1.38. P=4.7×10-6).21Oestrogen receptors α and β encoded by ESR1 and ESR2, respectively, have been extensively studied due to the assumed role of oestrogens in the development of endometrial cancer. O’Mara et al reported a lead SNP (rs79575945) in the ESR1 region that was associated with endometrial cancer (p=1.86×10-5).24 However, this SNP did not reach genome-wide significance in a more recent larger GWAS.21 No statistically significant associations have been reported between endometrial cancer and SNPs in the ESR2 gene region.AKT is an oncogene linked to endometrial carcinogenesis.

It is involved in the PI3K/AKT/mTOR pro-proliferative signalling pathway to inactivate apoptosis and allow cell survival. The A allele of rs2494737 and G allele of rs2498796 were reported to be associated with increased and decreased risk of endometrial cancer in 2016, respectively.22 30 However, this association was not replicated in a larger GWAS in 2018.21 Nevertheless, given the previous strong indications, and biological basis that could explain endometrial carcinogenesis, we decided to include an AKT1 variant (rs2498794) in our results.PTEN is a multi-functional tumour suppressor gene that regulates the AKT/PKB signalling pathway and is commonly mutated in many cancers including endometrial cancer.32 Loss-of-function germline mutations in PTEN are responsible for Cowden syndrome, which exerts a lifetime risk of endometrial cancer of up to 28%.9 Lacey and colleagues studied SNPs in the PTEN gene region. However, none showed significant differences in frequency between 447 endometrial cancer cases and 439 controls of European ancestry.33KRAS mutations are known to be present in endometrial cancer. These can be activated by high levels of KLF5 (transcriptional activator).

Three SNPs have been identified in or around KLF5 that are associated with endometrial cancer. The G allele of rs11841589 (OR 1.15, 95% CI 1.11 to 1.21. P=4.83×10-11), the A allele of rs9600103 (OR 1.23, 95% CI 1.16 to 1.30. P=3.76×10-12) and C allele of rs7981863 (OR 1.16, 95% CI 1.12 to 1.20.

P=2.70×10-17) have all been found to be associated with an increased likelihood of endometrial cancer in large European cohorts.21 30 34 It is worth noting that these SNPs are not independent, and hence they quite possibly tag the same causal variant.The MYC family of proto-oncogenes encode transcription factors that regulate cell proliferation, which can contribute to cancer development if dysregulated. The recent GWAS by O’Mara et al reported three SNPs within the MYC region that reached genome-wide significance with conditional p values reaching at least 5×10–8.35To test the utility of these SNPs as predictive markers, we devised a theoretical PRS calculation using the log ORs and EAFs per SNP from the published data. The results were very encouraging with an RR of 3.16 for the top 1% versus the mean, using all the top SNPs presented in table 1 and 2.09 when using only the SNPs that reached genome-wide significance (including AKT1).Controversy surrounding MDM2 variant SNP309MDM2 negatively regulates tumour suppressor gene TP53, and as such, has been extensively studied in relation to its potential role in predisposition to endometrial cancer. Our search identified six original studies of the association between MDM2 SNP rs2279744 (also referred to as SNP309) and endometrial cancer, all of which found a statistically significant increased risk per copy of the G allele.

Two more original studies were identified through our full-text evaluation. However, these were not included here as they did not meet our inclusion criteria—one due to small sample size, the other due to studying rs2279744 status dependent on another SNP.36 37 Even so, the two studies were described in multiple meta-analyses that are listed in table 3. Different permutations of these eight original studies appear in at least eight published meta-analyses. However, even the largest meta-analysis contained <2000 cases (table 3)38View this table:Table 3 Characteristics of studies that examined MDM2 SNP rs2279744In comparison, a GWAS including nearly 13 000 cases found no evidence of an association with OR and corresponding 95% CI of 1.00 (0.97 to 1.03) and a p value of 0.93 (personal communication).21 Nevertheless, we cannot completely rule out a role for MDM2 variants in endometrial cancer predisposition as the candidate-gene studies reported larger effects in Asians, whereas the GWAS primarily contained participants of European ancestry.

There is also some suggestion that the SNP309 variant is in linkage disequilibrium with another variant, SNP285, which confers an opposite effect.It is worth noting that the SNP285C/SNP309G haplotype frequency was observed in up to 8% of Europeans, thus requiring correction for the confounding effect of SNP285C in European studies.39 However, aside from one study conducted by Knappskog et al, no other study including the meta-analyses corrected for the confounding effect of SNP285.40 Among the studies presented in table 3, Knappskog et al (2012) reported that after correcting for SNP285, the OR for association of this haplotype with endometrial cancer was much lower, though still significant. Unfortunately, the meta-analyses which synthesised Knappskog et al (2012), as part of their analysis, did not correct for SNP285C in the European-based studies they included.38 41 42 It is also concerning that two meta-analyses using the same primary articles failed to report the same result, in two instances.38 42–44DiscussionThis article represents the most comprehensive systematic review to date, regarding critical appraisal of the available evidence of common low-penetrance variants implicated in predisposition to endometrial cancer. We have identified the most robust SNPs in the context of endometrial cancer risk. Of those, only 19 were significant at genome-wide level and a further five were considered marginally significant.

The largest GWAS conducted in this field was the discovery- and meta-GWAS by O’Mara et al, which utilised 12 096 cases and 108 979 controls.21 Despite the inclusion of all published GWAS and around 5000 newly genotyped cases, the total number did not reach anywhere near what is currently available for other common cancers such as breast cancer. For instance, BCAC (Breast Cancer Association Consortium) stands at well over 200 000 individuals with more than half being cases, and resulted in identification of ~170 SNPs in relation to breast cancer.19 45 A total of 313 SNPs including imputations were then used to derive a PRS for breast cancer.19 Therefore, further efforts should be directed to recruit more patients, with deep phenotypic clinical data to allow for relevant adjustments and subgroup analyses to be conducted for better precision.A recent pre-print study by Zhang and colleagues examined the polygenicity and potential for SNP-based risk prediction for 14 common cancers, including endometrial cancer, using available summary-level data from European-ancestry datasets.46 They estimated that there are just over 1000 independent endometrial cancer susceptibility SNPs, and that a PRS comprising all such SNPs would have an area under the receiver-operator curve of 0.64, similar to that predicted for ovarian cancer, but lower than that for the other cancers in the study. The modelling in the paper suggests that an endometrial cancer GWAS double the size of the current largest study would be able to identify susceptibility SNPs together explaining 40% of the genetic variance, but that in order to explain 75% of the genetic variance it would be necessary to have a GWAS comprising close to 150 000 cases and controls, far in excess of what is currently feasible.We found that the literature consists mainly of candidate-gene studies with small sample sizes, meta-analyses reporting conflicting results despite using the same set of primary articles, and multiple reports of significant SNPs that have not been validated by any larger GWAS. The candidate-gene studies were indeed the most useful and cheaper technique available until the mid to late 2000s.

However, a lack of reproducibility (particularly due to population stratification and reporting bias), uncertainty of reported associations, and considerably high false discovery rates make these studies much less appropriate in the post-GWAS era. Unlike the candidate-gene approach, GWAS do not require prior knowledge, selection of genes or SNPs, and provide vast amounts of data. Furthermore, both the genotyping process and data analysis phases have become cheaper, the latter particularly due to faster and open-access pre-phasing and imputation tools being made available.It is clear from table 1 that some SNPs were reported with wide 95% CI, which can be directly attributed to small sample sizes particularly when restricting the cases to non-endometrioid histology only, low EAF or poor imputation quality. Thus, these should be interpreted with caution.

Additionally, most of the SNPs reported by candidate-gene studies were not detected by the largest GWAS to date conducted by O’Mara et al.21 However, this does not necessarily mean that the possibility of those SNPs being relevant should be completely dismissed. Moreover, meta-analyses were attempted for other variants. However, these showed no statistically significant association and many presented with high heterogeneity between the respective studies (data not shown). Furthermore, as many studies utilised the same set of cases and/or controls, conducting a meta-analysis was not possible for a good number of SNPs.

It is therefore unequivocal that the literature is crowded with numerous small candidate-gene studies and conflicting data. This makes it particularly hard to detect novel SNPs and conduct meaningful meta-analyses.We found convincing evidence for 19 variants that indicated the strongest association with endometrial cancer, as shown in table 1. The associations between endometrial cancer and variants in or around HNF1B, CYP19A1, SOX4, MYC, KLF and EIF2AK found in earlier GWAS were then replicated in the latest and largest GWAS. These SNPs showed promising potential in a theoretical PRS we devised based on published data.

Using all 24 or genome-wide significant SNPs only, women with a PRS in the top 1% of the distribution would be predicted to have a risk of endometrial cancer 3.16 and 2.09 times higher than the mean risk, respectively.However, the importance of these variants and relevance of the proximate genes in a functional or biological context is challenging to evaluate. Long distance promoter regulation by enhancers may disguise the genuine target gene. In addition, enhancers often do not loop to the nearest gene, further complicating the relevance of nearby gene(s) to a GWAS hit. In order to elucidate biologically relevant candidate target genes in endometrial cancer, O’Mara et al looked into promoter-associated chromatin looping using a modern HiChIP approach.47 The authors utilised normal and tumoural endometrial cell lines for this analysis which showed significant enrichment for endometrial cancer heritability, with 103 candidate target genes identified across the 13 risk loci identified by the largest ECAC GWAS.

Notable genes identified here were CDKN2A and WT1, and their antisense counterparts. The former was reported to be nearby of rs1679014 and the latter of rs10835920, as shown in table 1. Moreover, of the 36 candidate target genes, 17 were found to be downregulated while 19 were upregulated in endometrial tumours.The authors also investigated overlap between the 13 endometrial cancer risk loci and top eQTL variants for each target gene.47 In whole blood, of the two particular lead SNPs, rs8822380 at 17q21.32 was a top eQTL for SNX11 and HOXB2, whereas rs937213 at 15q15.1 was a top eQTL for SRP14. In endometrial tumour, rs7579014 at 2p16.1 was found to be a top eQTL for BCL11A.

This is particularly interesting because BCL11A was the only nearby/candidate gene that had a GWAS association reported in both endometrioid and non-endometrioid subtypes. The study looked at protein–protein interactions between endometrial cancer drivers and candidate target gene products. Significant interactions were observed with TP53 (most significant), AKT, PTEN, ESR1 and KRAS, among others. Finally, when 103 target candidate genes and 387 proteins were combined together, 462 pathways were found to be significantly enriched.

Many of these are related to gene regulation, cancer, obesity, insulinaemia and oestrogen exposure. This study clearly showed a potential biological relevance for some of the SNPs reported by ECAC GWAS in 2018.Most of the larger included studies used cohorts primarily composed of women of broad European descent. Hence, there are negligible data available for other ethnicities, particularly African women. This is compounded by the lack of reference genotype data available for comparative analysis, making it harder for research to be conducted in ethnicities other than Europeans.

This poses a problem for developing risk prediction models that are equally valuable and predictive across populations. Thus, our results also are of limited applicability to non-European populations.Furthermore, considering that non-endometrioid cases comprise a small proportion (~20%) of all endometrial cancer cases, much larger cohort sizes are needed to detect any genuine signals for non-endometrioid tumours. Most of the evaluated studies looked at either overall/mixed endometrial cancer subtypes or endometrioid histology, and those that looked at variant associations with non-endometrioid histology were unlikely to have enough power to detect any signal with statistical significance. This is particularly concerning because non-endometrioid subtypes are biologically aggressive tumours with a much poorer prognosis that contribute disproportionately to mortality from endometrial cancer.

It is particularly important that attempts to improve early detection and prevention of endometrial cancer focus primarily on improving outcomes from these subtypes. It is also worth noting that, despite the current shift towards a molecular classification of endometrial cancer, most studies used the overarching classical Bokhman’s classification system, type I versus type II, or no histological classification system at all. Therefore, it is important to create and follow a standardised and comprehensive classification system for reporting tumour subtypes for future studies.This study compiled and presented available information for an extensively studied, yet unproven in large datasets, SNP309 variant in MDM2. Currently, there is no convincing evidence for an association between this variant and endometrial cancer risk.

Additionally, of all the studies, only one accounted for the opposing effect of a nearby variant SNP285 in their analyses. Thus, we conclude that until confirmed by a sufficiently large GWAS, this variant should not be considered significant in influencing the risk of endometrial cancer and therefore not included in a PRS. This is also true for the majority of the SNPs reported in candidate-gene studies, as the numbers fall far short of being able to detect genuine signals.This systematic review presents the most up-to-date evidence for endometrial cancer susceptibility variants, emphasising the need for further large-scale studies to identify more variants of importance, and validation of these associations. Until data from larger and more diverse cohorts are available, the top 24 SNPs presented here are the most robust common genetic variants that affect endometrial cancer risk.

The multiplicative effects of these SNPs could be used in a PRS to allow personalised risk prediction models to be developed for targeted screening and prevention interventions for women at greatest risk of endometrial cancer..

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Wealthy nations must do much more, much faster.The United Nations General Assembly in September 2021 will bring countries together at a critical time for marshalling collective action to tackle the zithromax canada pharmacy global environmental Cipro price comparison crisis. They will meet again at the biodiversity summit in Kunming, China, and the climate conference (Conference of the Parties (COP)26) in zithromax canada pharmacy Glasgow, UK. Ahead of these pivotal meetings, we—the editors of health journals worldwide—call for urgent action to keep average global temperature increases below 1.5°C, halt the destruction of nature and protect health.Health is already being harmed by global temperature increases and the destruction of the natural world, a state of affairs health professionals have been bringing attention to for decades.1 The science is unequivocal. A global increase of 1.5°C above the preindustrial average and the continued loss of biodiversity risk catastrophic harm zithromax canada pharmacy to health that will be impossible to reverse.2 3 Despite the world’s necessary preoccupation with buy antibiotics, we cannot wait for the zithromax to pass to rapidly reduce emissions.Reflecting the severity of the moment, this editorial appears in health journals across the world. We are united in zithromax canada pharmacy recognising that only fundamental and equitable changes to societies will reverse our current trajectory.The risks to health of increases above 1.5°C are now well established.2 Indeed, no temperature rise is ‘safe’.

In the past 20 years, heat-related mortality among people aged over 65 has increased by more than 50%.4 Higher temperatures have brought increased dehydration and renal function loss, dermatological malignancies, tropical s, adverse mental health outcomes, pregnancy complications, allergies, and cardiovascular and pulmonary morbidity and mortality.5 6 Harms disproportionately affect the most vulnerable, including children, older populations, ethnic minorities, poorer communities and those with underlying health problems.2 4Global heating is also contributing to the decline in global yield potential for major crops, falling by 1.8%–5.6% since 1981. This, together with the effects of extreme weather and soil depletion, is hampering efforts to reduce undernutrition.4 Thriving ecosystems are essential to human health, and the widespread destruction of nature, including habitats and species, is eroding water and food security and increasing the chance of zithromaxs.3 7 8The consequences of the environmental crisis fall disproportionately on those countries and communities that have contributed zithromax canada pharmacy least to the problem and are least able to mitigate the harms. Yet no country, no matter how wealthy, can shield itself from these impacts. Allowing the consequences to fall disproportionately on zithromax canada pharmacy the most vulnerable will breed more conflict, food insecurity, forced displacement and zoonotic disease, with severe implications for all countries and communities. As with the buy antibiotics zithromax, we zithromax canada pharmacy are globally as strong as our weakest member.Rises above 1.5°C increase the chance of reaching tipping points in natural systems that could lock the world into an acutely unstable state.

This would critically impair our ability to mitigate harms and to prevent catastrophic, runaway environmental change.9 10Global targets are not enoughEncouragingly, many governments, financial institutions and businesses are setting targets to reach net-zero emissions, including targets for 2030. The cost of renewable energy is dropping rapidly zithromax canada pharmacy. Many countries are aiming to protect at least 30% of the world’s land and oceans by 2030.11These promises zithromax canada pharmacy are not enough. Targets are easy to set and hard to achieve. They are zithromax canada pharmacy yet to be matched with credible short-term and longer-term plans to accelerate cleaner technologies and transform societies.

Emissions reduction plans do not adequately incorporate health considerations.12 Concern is growing that temperature rises above 1.5°C are beginning to be seen as inevitable, or even acceptable, to powerful members of the global community.13 Relatedly, current strategies for reducing emissions to net zero by the middle of the century implausibly assume that the world will acquire great capabilities to remove greenhouse gases from the atmosphere.14 15This insufficient action means that temperature increases are likely to be well in excess of zithromax canada pharmacy 2°C,16 a catastrophic outcome for health and environmental stability. Critically, the destruction of nature does not have parity of esteem with the climate element of the crisis, and every single global target to restore biodiversity loss by 2020 was missed.17 This is an overall environmental crisis.18Health professionals are united with environmental scientists, businesses and many others in rejecting that this outcome is inevitable. More can and must be done now—in Glasgow and Kunming—and in the immediate years that zithromax canada pharmacy follow. We join health professionals worldwide who have already supported calls for rapid action.1 19Equity must be at the centre of the global response. Contributing a fair share to the global effort means that reduction commitments must account for the cumulative, historical contribution each country has made to emissions, as zithromax canada pharmacy well as its current emissions and capacity to respond.

Wealthier countries will have to cut emissions more quickly, making reductions by 2030 zithromax canada pharmacy beyond those currently proposed20 21 and reaching net-zero emissions before 2050. Similar targets and emergency action are needed for biodiversity loss and the wider destruction of the natural world.To achieve these targets, governments must make fundamental changes to how our societies and economies are organised and how we live. The current strategy zithromax canada pharmacy of encouraging markets to swap dirty for cleaner technologies is not enough. Governments must intervene to support the redesign of transport systems, cities, production and distribution of food, markets for financial investments, health systems, and much more. Global coordination is needed to ensure that the rush for cleaner technologies does not come at the cost of more environmental destruction and human exploitation.Many governments met the threat of the buy antibiotics zithromax canada pharmacy zithromax with unprecedented funding.

The environmental crisis demands a zithromax canada pharmacy similar emergency response. Huge investment will be needed, beyond what is being considered or delivered anywhere in the world. But such investments will produce zithromax canada pharmacy huge positive health and economic outcomes. These include high-quality jobs, reduced air pollution, increased physical activity, and improved housing zithromax canada pharmacy and diet. Better air quality alone would realise health benefits that easily offset the global costs of emissions reductions.22These measures will also improve the social and economic determinants of health, the poor state of which may have made populations more vulnerable to the buy antibiotics zithromax.23 But the changes cannot be achieved through a return to damaging austerity policies or the continuation of the large inequalities of wealth and power within and between countries.Cooperation hinges on wealthy nations doing moreIn particular, countries that have disproportionately created the environmental crisis must do more to support low-income and middle-income countries to build cleaner, healthier and more resilient societies.

High-income countries must meet and go beyond zithromax canada pharmacy their outstanding commitment to provide $100 billion a year, making up for any shortfall in 2020 and increasing contributions to and beyond 2025. Funding must be equally split between mitigation and adaptation, including improving the resilience of health systems.Financing should be through grants rather than loans, building local capabilities and truly empowering communities, and should come alongside forgiving large debts, which constrain the agency of so many low-income countries. Additional funding must be marshalled to compensate for inevitable loss and damage caused by the consequences of the zithromax canada pharmacy environmental crisis.As health professionals, we must do all we can to aid the transition to a sustainable, fairer, resilient and healthier world. Alongside acting to reduce the harm from the environmental crisis, we should proactively contribute to global prevention of further damage and action on the root causes of the crisis zithromax canada pharmacy. We must hold global leaders to account and continue to educate others about the health risks of the crisis.

We must join in the work to achieve zithromax canada pharmacy environmentally sustainable health systems before 2040, recognising that this will mean changing clinical practice. Health institutions have already divested more than $42 billion zithromax canada pharmacy of assets from fossil fuels. Others should join them.4The greatest threat to global public health is the continued failure of world leaders to keep the global temperature rise below 1.5°C and to restore nature. Urgent, society-wide changes must be made and will lead to a fairer zithromax canada pharmacy and healthier world. We, as editors of health journals, call for governments and other leaders to act, marking 2021 as the year that the world finally changes course.Ethics statementsPatient consent for publicationNot required..

Wealthy nations must do much more, much faster.The United Nations can you buy over the counter zithromax General Assembly Visit Website in September 2021 will bring countries together at a critical time for marshalling collective action to tackle the global environmental crisis. They will can you buy over the counter zithromax meet again at the biodiversity summit in Kunming, China, and the climate conference (Conference of the Parties (COP)26) in Glasgow, UK. Ahead of these pivotal meetings, we—the editors of health journals worldwide—call for urgent action to keep average global temperature increases below 1.5°C, halt the destruction of nature and protect health.Health is already being harmed by global temperature increases and the destruction of the natural world, a state of affairs health professionals have been bringing attention to for decades.1 The science is unequivocal. A global increase of 1.5°C above the preindustrial average and the continued loss of biodiversity risk catastrophic harm to health that will be impossible to reverse.2 3 Despite the world’s necessary preoccupation with buy antibiotics, we cannot wait for the zithromax to pass to rapidly reduce emissions.Reflecting the severity of the moment, this editorial appears in health journals across the world can you buy over the counter zithromax. We are united in recognising that only fundamental can you buy over the counter zithromax and equitable changes to societies will reverse our current trajectory.The risks to health of increases above 1.5°C are now well established.2 Indeed, no temperature rise is ‘safe’.

In the past 20 years, heat-related mortality among people aged over 65 has increased by more than 50%.4 Higher temperatures have brought increased dehydration and renal function loss, dermatological malignancies, tropical s, adverse mental health outcomes, pregnancy complications, allergies, and cardiovascular and pulmonary morbidity and mortality.5 6 Harms disproportionately affect the most vulnerable, including children, older populations, ethnic minorities, poorer communities and those with underlying health problems.2 4Global heating is also contributing to the decline in global yield potential for major crops, falling by 1.8%–5.6% since 1981. This, together with the effects of extreme weather and soil depletion, is hampering efforts to reduce undernutrition.4 Thriving ecosystems are essential to human health, and the widespread destruction of nature, including habitats and species, is eroding water and food security and increasing the chance of zithromaxs.3 7 8The consequences of can you buy over the counter zithromax the environmental crisis fall disproportionately on those countries and communities that have contributed least to the problem and are least able to mitigate the harms. Yet no country, no matter how wealthy, can shield itself from these impacts. Allowing the consequences to fall disproportionately on the most vulnerable can you buy over the counter zithromax will breed more conflict, food insecurity, forced displacement and zoonotic disease, with severe implications for all countries and communities. As with the buy antibiotics zithromax, we are globally as strong as our weakest member.Rises above can you buy over the counter zithromax 1.5°C increase the chance of reaching tipping points in natural systems that could lock the world into an acutely unstable state.

This would critically impair our ability to mitigate harms and to prevent catastrophic, runaway environmental change.9 10Global targets are not enoughEncouragingly, many governments, financial institutions and businesses are setting targets to reach net-zero emissions, including targets for 2030. The cost of renewable can you buy over the counter zithromax energy is dropping rapidly. Many countries are aiming to protect can you buy over the counter zithromax at least 30% of the world’s land and oceans by 2030.11These promises are not enough. Targets are easy to set and hard to achieve. They are yet to can you buy over the counter zithromax be matched with credible short-term and longer-term plans to accelerate cleaner technologies and transform societies.

Emissions reduction plans do not adequately incorporate health considerations.12 Concern is growing that temperature rises above 1.5°C are beginning to be seen as inevitable, or even acceptable, to powerful members of the global community.13 Relatedly, current strategies for reducing emissions to net zero by the middle of the century implausibly assume that the world will acquire great capabilities to remove greenhouse gases from the atmosphere.14 15This insufficient action can you buy over the counter zithromax means that temperature increases are likely to be well in excess of 2°C,16 a catastrophic outcome for health and environmental stability. Critically, the destruction of nature does not have parity of esteem with the climate element of the crisis, and every single global target to restore biodiversity loss by 2020 was missed.17 This is an overall environmental crisis.18Health professionals are united with environmental scientists, businesses and many others in rejecting that this outcome is inevitable. More can and must be done now—in Glasgow and Kunming—and in can you buy over the counter zithromax the immediate years that follow. We join health professionals worldwide who have already supported calls for rapid action.1 19Equity must be at the centre of the global response. Contributing a fair share to the global effort means that reduction commitments must account for the cumulative, historical contribution each country has made to emissions, as well as its current emissions and capacity to can you buy over the counter zithromax respond.

Wealthier countries will have to cut emissions more quickly, making reductions by 2030 beyond can you buy over the counter zithromax those currently proposed20 21 and reaching net-zero emissions before 2050. Similar targets and emergency action are needed for biodiversity loss and the wider destruction of the natural world.To achieve these targets, governments must make fundamental changes to how our societies and economies are organised and how we live. The current strategy of encouraging markets to swap dirty for cleaner technologies is can you buy over the counter zithromax not enough. Governments must intervene to support the redesign of transport systems, cities, production and distribution of food, markets for financial investments, health systems, and much more. Global coordination is needed to ensure that the rush for cleaner technologies does not come at the cost of more environmental destruction and human exploitation.Many governments met the threat of the can you buy over the counter zithromax buy antibiotics zithromax with unprecedented funding.

The environmental crisis demands can you buy over the counter zithromax a similar emergency response. Huge investment will be needed, beyond what is being considered or delivered anywhere in the world. But such investments will produce huge positive health and economic can you buy over the counter zithromax outcomes. These include high-quality jobs, reduced air pollution, increased physical activity, and improved housing and diet can you buy over the counter zithromax. Better air quality alone would realise health benefits that easily offset the global costs of emissions reductions.22These measures will also improve the social and economic determinants of health, the poor state of which may have made populations more vulnerable to the buy antibiotics zithromax.23 But the changes cannot be achieved through a return to damaging austerity policies or the continuation of the large inequalities of wealth and power within and between countries.Cooperation hinges on wealthy nations doing moreIn particular, countries that have disproportionately created the environmental crisis must do more to support low-income and middle-income countries to build cleaner, healthier and more resilient societies.

High-income countries must meet and go beyond their outstanding commitment to provide $100 billion a year, making up for any shortfall in can you buy over the counter zithromax 2020 and increasing contributions to and beyond 2025. Funding must be equally split between mitigation and adaptation, including improving the resilience of health systems.Financing should be through grants rather than loans, building local capabilities and truly empowering communities, and should come alongside forgiving large debts, which constrain the agency of so many low-income countries. Additional funding must be marshalled to compensate for inevitable loss and damage caused by the consequences of the environmental crisis.As health professionals, we must do all we can to aid the transition to a sustainable, fairer, resilient can you buy over the counter zithromax and healthier world. Alongside acting to reduce the harm from the environmental crisis, we should proactively contribute to global prevention of can you buy over the counter zithromax further damage and action on the root causes of the crisis. We must hold global leaders to account and continue to educate others about the health risks of the crisis.

We must join in the work to achieve environmentally sustainable health systems before 2040, recognising can you buy over the counter zithromax that this will mean changing clinical practice. Health institutions have already divested more than $42 billion of assets from fossil can you buy over the counter zithromax fuels. Others should join them.4The greatest threat to global public health is the continued failure of world leaders to keep the global temperature rise below 1.5°C and to restore nature. Urgent, society-wide changes must can you buy over the counter zithromax be made and will lead to a fairer and healthier world. We, as editors of health journals, call for governments and other leaders to act, marking 2021 as the year that the world finally changes course.Ethics statementsPatient consent for publicationNot required..

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Hospitals led all sectors on the healthcare hiring front in December, but the industry's employment recovery continues to https://www.vereg.eu/service-produkthinweise/leistungserklarung/ be azithromycin zithromax 500mg tablet a tough slog. Hospitals added an estimated 31,500 jobs in December, which is better than the sector has done in months and represents an increase of 0.6% from the previous month, preliminary numbers released Friday by the U.S. Bureau of Labor Statistics azithromycin zithromax 500mg tablet show. The job growth is up significantly from just 7,600 added in November. Healthcare overall added 38,800 jobs in December, an increase of 25% from the 31,000 jobs added in November—a number the government revised down significantly from its azithromycin zithromax 500mg tablet preliminary estimate.

The 16 million Americans working in the healthcare industry last much was up 0.2% from the November total. Total nonfarm employment azithromycin zithromax 500mg tablet in the country actually shrunk by 140,000 jobs in December, although the unemployment rate held steady at 6.7%. The BLS attributed the decline to spikes in buy antibiotics cases and efforts to control the zithromax. The pace azithromycin zithromax 500mg tablet of hiring lagged in healthcare's ambulatory sector. The estimated 20,700 ambulatory jobs added last month represented an increase of 0.3%, but was down from 34,400 new hires in November, a number that has been revised down from its earlier estimate.

The preliminary December numbers show physician office hiring was basically azithromycin zithromax 500mg tablet flat, as was medical and diagnostic laboratories. It appears to have been a strong month for dentists' offices, which added an estimated 4,600 jobs, up from 2,900 buy zithromax online overnight shipping in November. New home health hires were down significantly in December with just 1,500 azithromycin zithromax 500mg tablet jobs added, per the government's estimate. However, that's after a very strong November in which home health added 12,800 jobs.Outpatient care center hiring was down last month, having added an estimated 4,300 jobs last month, compared with 7,200 in November. December was another rocky month for nursing homes, which shed azithromycin zithromax 500mg tablet an estimated 6,100 jobs.

That's half the number of jobs they lost in November, however. Community care facilities for the elderly lost an estimated 5,000 jobs in December, a noteworthy swing from their 3,900-job gain in November.The number of people on temporary layoff increased by an estimated 277,000 to 3 million in December, according to azithromycin zithromax 500mg tablet the BLS. While down considerably from the high of 18 million in April, that's still higher than the 2.3 million people on temporary layoff in February. The number of permanent job losers—3.4 million in December—is up by 2.1 million azithromycin zithromax 500mg tablet since February. The BLS noted that more people worked from home because of the zithromax in December.

23.7% of employed people, compared with 21.8% in azithromycin zithromax 500mg tablet November. The number of people who said they couldn't work last month because their employer closed or lost business due to the zithromax grew by 1 million people compared with November..

Hospitals led all sectors on my explanation the healthcare can you buy over the counter zithromax hiring front in December, but the industry's employment recovery continues to be a tough slog. Hospitals added an estimated 31,500 jobs in December, which is better than the sector has done in months and represents an increase of 0.6% from the previous month, preliminary numbers released Friday by the U.S. Bureau of can you buy over the counter zithromax Labor Statistics show.

The job growth is up significantly from just 7,600 added in November. Healthcare overall added 38,800 jobs can you buy over the counter zithromax in December, an increase of 25% from the 31,000 jobs added in November—a number the government revised down significantly from its preliminary estimate. The 16 million Americans working in the healthcare industry last much was up 0.2% from the November total.

Total nonfarm employment in the country actually shrunk by 140,000 jobs in can you buy over the counter zithromax December, although the unemployment rate held steady at 6.7%. The BLS attributed the decline to spikes in buy antibiotics cases and efforts to control the zithromax. The pace of hiring lagged in healthcare's ambulatory sector can you buy over the counter zithromax.

The estimated 20,700 ambulatory jobs added last month represented an increase of 0.3%, but was down from 34,400 new hires in November, a number that has been revised down from its earlier estimate. The preliminary December numbers show physician office hiring was basically can you buy over the counter zithromax flat, as was medical and diagnostic laboratories. It appears to have been a strong month for dentists' offices, which added an estimated 4,600 jobs, up cost of generic zithromax from 2,900 in November.

New home health hires were down significantly in December with just 1,500 jobs added, per the government's can you buy over the counter zithromax estimate. However, that's after a very strong November in which home health added 12,800 jobs.Outpatient care center hiring was down last month, having added an estimated 4,300 jobs last month, compared with 7,200 in November. December was another rocky month for can you buy over the counter zithromax nursing homes, which shed an estimated 6,100 jobs.

That's half the number of jobs they lost in November, however. Community care facilities for the elderly lost an estimated 5,000 jobs in December, a noteworthy swing from their 3,900-job gain in November.The number of people on temporary can you buy over the counter zithromax layoff increased by an estimated 277,000 to 3 million in December, according to the BLS. While down considerably from the high of 18 million in April, that's still higher than the 2.3 million people on temporary layoff in February.

The number of permanent job losers—3.4 can you buy over the counter zithromax million in December—is up by 2.1 million since February. The BLS noted that more people worked from home because of the zithromax in December. 23.7% of employed people, compared with 21.8% can you buy over the counter zithromax in November.

The number of people who said they couldn't work last month because their employer closed or lost business due to the zithromax grew by 1 million people compared with November..

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As the first anniversary of the first adult buy antibiotics cases approaches, we reflect on what we’ve learned since where to buy zithromax online December 2019 and could be excused a frisson of excitement about what the soon-to-be-released treatments might offer when to take zithromax. More on this story soon of course, but here are some thought provoking non-corona papers.Next generation sequencingIt seems only a few minutes since the CGH array was being heralded as the great diagnostic saviour after the limitations of the ‘traditional’ karyotype and deletion detection methods were recognised. Next generation sequencing, based on refinements on technology introduced by Sanger in the 1970s has now effectively supplanted all that came before to the extent that it is finding use (or being touted for use) in rapid, ‘bedside’ diagnostics (metabolic to dysmorphology) as well as the better known outpatient work up approach.

Diana Baralle’s editorial on the science behind NGS (including whole exome and whole genome sequencing) adds to two studies from Singapore, Neha when to take zithromax Bhatia and Heming Wei in which additional diagnostic yield in children in whom traditional methods have been negative. Both studies found positives in the 35% to 40% range, higher in certain phenotypes (neuromuscular and skeletal dysplasia) universal additional information for counselling and results which often changed treatment. See pages 1, 31 and 38Global child healthSnakebite.

ManagementJay Halbert and Jacqueline Le Geyt continue their brilliant series on snakebite, this instalment when to take zithromax reviewing management. Never has primum non nocere been more germane, much harm being (unwittingly) caused by traditional ‘cures’. Primary treatment is generic to all species and includes.

Non-weight bearing and simple when to take zithromax analgesia. Immobilisation of the bitten part of the body so it lies below the level of the heart. Referral to a medical facility with attention to the airway, oxygenation and prevention of aspiration and gaining intravenous access in an unaffected limb.

Harmful practices when to take zithromax such as incision, suction devices, snake stones, cryotherapy and tourniquets are now known to be high risk. Tourniquets can increase local tissue destruction and cause gangrene. Pressure immobilisation bandages are useful in bites by elapids (neurotoxic snakes that do not cause local swelling) to reduce lymphatic flow but can cause harm in viperid bites and are therefore not recommended by WHO in most snake bites.

If the snake type has been identified (not always possible—photos can help) then anti-venom specific to the family of the biting snake can be added. This treatment is specific to when to take zithromax the type of bite, the coagulopathy of the Viperidae or the neurotoxicity of the Elapidae families. See page 14Epinephrine auto-injectors.

Gentle or jabbing?. There are two when to take zithromax schools of thought as to the optimum way of administering emergency epinephrine with an auto-injector for anaphylaxis. The gentler place and press method and (possibly faster) method of swing and jab.

Confusingly, different devices recommend one or the other, while some (eg, Epipen) recommend both depending on geographical region. Louise Pike and David Tuthill assess whether there are other gains from the use of one method over the other, using the length of (paintball drawn) laceration from needle-free when to take zithromax practice pen tests as a marker for trauma and pain in a group of Welsh primary school children. The place and press technique ‘incurred’ far less of a mark, suggesting less real-life risk of a laceration and a more pleasant experience (if that’s an appropriate term given the use to treat anaphylaxis).

For sheer pragmatism and ingenuity, this is my editor’s choice for the month. See page 54Non alcoholic fatty liver diseaseIn a compelling review of non alcoholic fatty liver disease (NAFLD), precursor to NASH, steatosis, Meera Shaunak explores when to take zithromax the pathophysiology and potential interventions. The folkloric perception of the obesity equation has now been debunked.

It is one part of the equation, but dietary composition (UFAs, disaccharides) and chronic hypoxia and ethnicity all contribute. Intervention is extremely difficult, the usual arsenal of metabolic-modifying drugs (metformin, losartan, anti-oxidants), so far in the ‘tantalisingly promising’ rather than clearcut when to take zithromax delivering phase. See page 3Thyroid anatomical phenotypesThough thyroid imaging after a diagnosis of congenital hypothyroidism (CH) is deemed ‘desirable’, the use of scintigraphy (a much more sensitive tool for detection of variants in position) has yet to become embedded in the routine work up, partly as many are yet to be convinced that it changes management.

Chris Worth’s analysis of a 10 year (2007–2017) study of neonatal CH/ TSH screen positive babies might change this view. In their series, scintigraphy was routine and more babies with gland in situ (GIS) and gland ectopia and fewer a/dysplastic glands than expected found.

ManagementJay Halbert and Jacqueline Le Geyt continue their brilliant series on can you buy over the counter zithromax snakebite, this instalment http://bacma.co.uk/uncategorized/hello-world/ reviewing management. Never has primum non nocere been more germane, much harm being (unwittingly) caused by traditional ‘cures’. Primary treatment is generic to all species and includes. Non-weight bearing and can you buy over the counter zithromax simple analgesia.

Immobilisation of the bitten part of the body so it lies below the level of the heart. Referral to a medical facility with attention to the airway, oxygenation and prevention of aspiration and gaining intravenous access in an unaffected limb. Harmful practices such as incision, suction devices, snake stones, cryotherapy and tourniquets are now known to be high can you buy over the counter zithromax risk. Tourniquets can increase local tissue destruction and cause gangrene.

Pressure immobilisation bandages are useful in bites by elapids (neurotoxic snakes that do not cause local swelling) to reduce lymphatic flow but can cause harm in viperid bites and are therefore not recommended by WHO in most snake bites. If the snake type has been identified (not always possible—photos can help) then anti-venom can you buy over the counter zithromax specific to the family of the biting snake can be added. This treatment is specific to the type of bite, the coagulopathy of the Viperidae or the neurotoxicity of the Elapidae families. See page 14Epinephrine auto-injectors.

Gentle or can you buy over the counter zithromax jabbing?. There are two schools of thought as to the optimum way of administering emergency epinephrine with an auto-injector for anaphylaxis. The gentler place and press method and (possibly faster) method of swing and jab. Confusingly, different devices recommend one or the other, while some (eg, Epipen) recommend both depending on geographical region.

Louise Pike and David Tuthill assess whether there are other gains from the use of one method over the other, using the length of (paintball drawn) laceration from needle-free practice pen tests as a marker for trauma and pain in can you buy over the counter zithromax a group of Welsh primary school children. The place and press technique ‘incurred’ far less of a mark, suggesting less real-life risk of a laceration and a more pleasant experience (if that’s an appropriate term given the use to treat anaphylaxis). For sheer pragmatism and ingenuity, this is my editor’s choice for the month. See page 54Non alcoholic fatty liver diseaseIn a compelling review of non alcoholic fatty liver disease (NAFLD), can you buy over the counter zithromax precursor to NASH, steatosis, Meera Shaunak explores the pathophysiology and potential interventions.

The folkloric perception of the obesity equation has now been debunked. It is one part of the equation, but dietary composition (UFAs, disaccharides) and chronic hypoxia and ethnicity all contribute. Intervention is extremely difficult, the usual arsenal of metabolic-modifying drugs (metformin, losartan, can you buy over the counter zithromax anti-oxidants), so far in the ‘tantalisingly promising’ rather than clearcut delivering phase. See page 3Thyroid anatomical phenotypesThough thyroid imaging after a diagnosis of congenital hypothyroidism (CH) is deemed ‘desirable’, the use of scintigraphy (a much more sensitive tool for detection of variants in position) has yet to become embedded in the routine work up, partly as many are yet to be convinced that it changes management.

Chris Worth’s analysis of a 10 year (2007–2017) study of neonatal CH/ TSH screen positive babies might change this view. In their can you buy over the counter zithromax series, scintigraphy was routine and more babies with gland in situ (GIS) and gland ectopia and fewer a/dysplastic glands than expected found. Those with GIS had lower median TSH and higher LT4 than their counterparts and a high chance of the hypothyroidism being transient (off treatment by 3 years of age) and it feels as if scintigraphy has untapped potential as a prognostic tool. See page 77Cycle of deprivation and abuseThough the use of electronic records is ubiquitous, there is still much untapped potential.

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