Publications by authors named "Michael S Irwig"

Purpose Of Review: The use of androgenic anabolic steroids (AAS) is rising, particularly among recreational athletes. This review addresses growing concerns about the underrecognized cardiovascular and multiorgan consequences of chronic AAS exposure with a focus on noncompetitive populations.

Recent Findings: It is well documented that AAS use enhances muscle mass and strength, but at the cost of multisystem toxicity including endocrine disruption, hepatotoxicity, and mood disorders.

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Injectable estrogens are options for gender-affirming hormone therapy per guidelines, which suggest intramuscular dosages of 5-30 mg every 2 weeks or 2-10 mg weekly with estradiol cypionate or valerate interchangeably. Data among transgender and gender-diverse patients are limited due to local unavailability and concerns around laboratory assay variability and estradiol (E2) level fluctuation. We note a concerning trend where patients are prescribed high-dose injections based on the guidelines leading to serum E2 levels well above the range recommended in the same guidelines.

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Background: The effect of gender-affirming testosterone therapy (TT) on breast cancer risk is unclear. This study investigated the association between TT and breast tissue composition and breast tissue density in trans masculine individuals (TMIs).

Methods: Of the 444 TMIs who underwent chest-contouring surgeries between 2013 and 2019, breast tissue composition was assessed in 425 TMIs by the pathologists (categories of lobular atrophy and stromal composition) and using our automated deep-learning algorithm (% epithelium, % fibrous stroma, and % fat).

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Objective: Feminizing gender-affirming hormone therapy is the mainstay of treatment for many transgender and gender diverse people. Injectable estradiol preparations are recommended by the World Professional Association for Transgender Health Standards of Care 8 and the Endocrine Society guidelines. Many patients prefer this route of administration, but few studies have rigorously assessed optimal dosing or route.

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Objective: Determine the association between TT and breast tissue composition and breast tissue density in trans masculine individuals (TMIs).

Design: This is a cross-sectional study.

Setting: TMIs (n=444) underwent chest-contouring surgeries to treat their gender dysphoria between 2013 and 2019 at an urban medical center.

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There is limited literature about breast cancer in the transgender population. Very little is known about how gender-affirming hormone therapy affects their breast cancer risk. On the other end, for those diagnosed with breast cancer, there are no clinical guidelines to manage their breast cancer, specifically, how to manage their gender-affirming hormone therapy during breast cancer treatment.

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Finasteride may cause low libido and erectile dysfunction and the product label of finasteride also includes post-marketing reactions of sexual dysfunction that continued after discontinuation of treatment, as well as male infertility and depression. The aim of this study was to evaluate the beliefs and counseling practices among dermatologists regarding adverse effects of finasteride. Anonymous paper surveys were personally distributed to 122 attendees at two annual major dermatology meetings.

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Background: The effects of gender-affirming hormone therapy on lipid profiles among transgender adults have been inconsistent and incompletely characterized.

Objective: To longitudinally assess changes to lipid profiles following hormone therapy and to establish prevalence rates of hyperlipidemia/low HDL-cholesterol.

Methods: This longitudinal study followed lipid profiles of 366 transgender and gender-diverse adult patients (170 transfeminine and 196 transmasculine; mean age, 28 years) in Washington DC USA.

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Although there has been a dramatic increase in visibility and recognition of transgender and gender-diverse populations, remarkably little has been published on prevalence rates of hypertension within these populations. In addition to summarizing the limited data on prevalence rates, this review compares the prevalence rates with those of cisgender populations and explores whether gender-affirming hormone therapy affects blood pressure and hypertension rates. The studies show that hypertension affects a significant proportion of transgender and gender-diverse people and support the practice of routinely monitoring blood pressure in transgender and gender-diverse people, especially after the initiation of gender-affirming hormone therapy.

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Article Synopsis
  • A study aims to establish diagnostic criteria for persistent sexual dysfunctions linked to certain medications, including antidepressants, 5 alpha-reductase inhibitors, and isotretinoin.
  • The research synthesizes data from significant case series and incorporates expert input to define conditions like post-SSRI sexual dysfunction (PSSD) and persistent genital arousal disorder (PGAD).
  • Key symptoms identified include decreased sexual sensation, desire, and function, along with potential emotional and cognitive issues; the findings also introduce the term "post-SSRI asexuality" to address sexual dampening from early exposure to these medications.
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Male hypogonadism is defined as an abnormally low serum testosterone concentration or sperm count. As men age, often in the context of obesity and other comorbid conditions, serum testosterone levels may decrease. Normalizing serum testosterone levels in male adults with hypogonadism may improve symptoms related to androgen deficiency, but controversies exist regarding the long-term benefits and risks of hormone supplementation in this setting.

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Despite the growing number of adult transgender and gender diverse (TGD) patients seeking health services, there are many unknowns regarding how routine screening recommendations should be applied to TGD persons receiving gender-affirming hormone therapy (GAHT). Patients taking GAHT may have disease risks that differ from what is expected based on their sex assigned at birth or affirmed gender identity. We discuss two patient cases, one transgender man and one transgender woman who present for routine medical care, to review several conditions that may be impacted by the hormones utilized in masculinizing and feminizing GAHT and for which screening recommendations are available for TGD adults: cardiovascular risk factors, osteoporosis, breast cancer, cervical cancer, and prostate cancer.

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This commentary will explore the important clinical question regarding whether the antiandrogen class of 5α-reductase inhibitors should be considered as an effective and safe treatment option for transfeminine and/or transmasculine individuals. The use of finasteride in transfeminine individuals is based upon the theory that the goal of medical treatment is to reduce the concentrations of androgens, including dihydrotestosterone. Nonetheless, it is unclear that finasteride will have any additive clinical benefit once testosterone levels have already been lowered with standard treatment regimens (i.

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A decades-long decline in sperm counts in Western countries has coincided with an increase in obesity rates, prompting study into their association. Few of these studies have incorporated men of color, the sperm health of whom is relatively unknown. The present exploratory study evaluated the association between body mass index (BMI), race, ethnicity, and sperm parameters among a diverse sample of U.

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Over the past few decades, there has been an unprecedented rise in off-label use and misuse of testosterone, growth hormone, thyroid hormone, and adrenal supplements. Testosterone therapy is often promoted to men for the treatment of low energy, lower libido, erectile dysfunction, and other symptoms. Growth hormone is used in attempts to improve athletic performance in athletes and to attenuate aging in older adults.

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Context: There has been a proliferation of clinical practice guidelines in endocrinology and a coincident increased interest in transparency regarding relationships between physicians and industry.

Evidence Acquisition: We collected self-reported disclosures and Open Payments data for 169 authors of 26 clinical practice guidelines published between 2010 and 2017 by the Endocrine Society. Conflicts of interest in which pharmaceutical and device companies manufactured drugs or products pertinent to an author's specific clinical practice guideline(s) were deemed relevant.

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