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Related Concept Videos

Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
Menopause01:28

Menopause

Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...
Anxiolytic Drugs: Overview01:26

Anxiolytic Drugs: Overview

Anxiolytic drugs are vital in managing anxiety disorders by effectively alleviating symptoms such as excessive fear, tachycardia, and tremors. There are several classes of anxiolytic medications, each with unique mechanisms of action and potential side effects.
Primary Types of Anxiolytic Drugs
1. Benzodiazepines:
Benzodiazepines bind to the GABA-A receptor in the brain, enhancing GABA's interaction. This action reduces neurotransmission, effectively blocking anxiety-associated limbic circuitry.
Testosterone: Functions and Regulation01:26

Testosterone: Functions and Regulation

The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
Infertility in Males01:23

Infertility in Males

Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
Adrenergic Antagonists: Pharmacological Actions of ɑ-Receptor Blockers01:22

Adrenergic Antagonists: Pharmacological Actions of ɑ-Receptor Blockers

α-Adrenergic antagonists, known as α-blockers, exert their effects by inhibiting α-adrenoceptors, leading to specific physiological actions. α1-blockers and α2-blockers have distinct pharmacological actions and therapeutic applications.
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Corrigendum to "Radical Prostatectomy or Observation for Clinically Localized Prostate Cancer: Extended Follow-up of the Prostate Cancer Intervention Versus Observation Trial (PIVOT)" [Eur Urol 77 (2020) 713-24].

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The Clinical Cell-Cycle Risk (CCR) Score Is Associated With Metastasis After Radiation Therapy and Provides Guidance on When to Forgo Combined Androgen Deprivation Therapy With Dose-Escalated Radiation.

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Personalizing Localized Prostate Cancer: Validation of a Combined Clinical Cell-cycle Risk (CCR) Score Threshold for Prognosticating Benefit From Multimodality Therapy.

Clinical genitourinary cancer·2021
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Reply to Roderick C.N. van den Bergh, Massimo Valerio, Derya Tilki, and Giorgio Gandaglia's Letter to the Editor re: Timothy J. Wilt, Tien N. Vo, Lisa Langsetmo, et al. Radical Prostatectomy or Observation for Clinically Localized Prostate Cancer: Extended Follow-up of the Prostate Cancer Intervention Versus Observation Trial (PIVOT). Eur Urol. In press. http://dx.doi.org/10.1016/j.eururo.2020.02.009.

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Related Experiment Video

Updated: Jul 19, 2026

Murine Prostate Micro-dissection and Surgical Castration
08:49

Murine Prostate Micro-dissection and Surgical Castration

Published on: May 11, 2016

Testosterone replacement in men with andropause: an overview.

Michael K Brawer

    Reviews in Urology
    |September 21, 2006
    PubMed
    Summary

    Aging men experience declining testosterone levels, making diagnosis of andropause challenging. Testosterone supplementation is considered, but requires careful screening due to potential prostate cancer risks.

    Area of Science:

    • Endocrinology
    • Geriatrics
    • Urology

    Background:

    • Serum testosterone levels decrease with age, leading to andropause.
    • Diagnosing andropause is difficult due to gradual onset and overlapping symptoms with other conditions.
    • Standardized testosterone level measurements and age-specific norms are lacking.

    Purpose of the Study:

    • To review the challenges in diagnosing and treating age-related testosterone decline.
    • To discuss the safety and efficacy of testosterone supplementation.
    • To highlight the importance of prostatic carcinoma screening before testosterone therapy.

    Main Methods:

    • Review of existing clinical studies and literature on testosterone levels, andropause, and testosterone replacement therapy.
    • Analysis of diagnostic challenges and side effect profiles.

    Related Experiment Videos

    Last Updated: Jul 19, 2026

    Murine Prostate Micro-dissection and Surgical Castration
    08:49

    Murine Prostate Micro-dissection and Surgical Castration

    Published on: May 11, 2016

  • Evaluation of available testosterone formulations.
  • Main Results:

    • Testosterone levels decline with age, impacting male health.
    • Clinical diagnosis of andropause is complicated by non-specific symptoms and lack of established reference ranges.
    • Testosterone supplementation shows potential safety in studies, but long-term placebo-controlled trials are absent.
    • Prostate cancer screening is crucial before initiating testosterone therapy.
    • Transdermal gels are a preferred, albeit costly, method for testosterone administration.

    Conclusions:

    • Accurate diagnosis of andropause requires more than just testosterone level testing.
    • Testosterone replacement therapy necessitates thorough patient evaluation, including prostate cancer screening.
    • Further long-term research is needed to fully establish the safety and efficacy of testosterone supplementation.