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Disorders of the Male Reproductive System01:20

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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.
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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...
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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...
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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...
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Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
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The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
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Pituitary Dysfunction Among Men Presenting with Hypogonadism.

Shiri Levy1, Mingxue Arguello2, Mohamed Macki3

  • 1Division of Endocrinology, Diabetes, and Bone & Mineral Disorder, Henry Ford Medical Center--New Center One, 3031 W. Grand Blvd, Detroit, MI, 48202, USA. Slevy1@hfhs.org.

Current Urology Reports
|November 18, 2019
PubMed
Summary
This summary is machine-generated.

Evaluating male hypogonadism requires distinguishing primary from secondary causes and understanding pituitary function. This review details the latest guidelines for assessing pituitary function in hypogonadal men.

Keywords:
Male hypogonadismPituitary macroadenomaPituitary microadenomaTestosterone deficiency

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Area of Science:

  • Endocrinology
  • Men's Health
  • Reproductive Medicine

Background:

  • Hypogonadism is a prevalent endocrine disorder in men.
  • Accurate diagnosis involves differentiating primary testicular failure from secondary pituitary-hypothalamic dysfunction.
  • Awareness of adult-onset hypogonadism and its unique diagnostic challenges is crucial.

Purpose of the Study:

  • To present the most current guidelines for evaluating pituitary function in men with hypogonadism.
  • To emphasize the importance of distinguishing between different types of hypogonadism.
  • To provide a comprehensive overview of diagnostic considerations for clinicians.

Main Methods:

  • Review of up-to-date clinical guidelines and literature.
  • Focus on diagnostic criteria for pituitary dysfunction in hypogonadal men.
  • Discussion of testosterone testing pitfalls and pituitary imaging indications.

Main Results:

  • Differentiating primary (testicular) and secondary (pituitary-hypothalamic) hypogonadisms is essential.
  • Low or inappropriately normal gonadotropins suggest central causes requiring investigation of the hypothalamus-pituitary axis.
  • Pituitary incidentalomas are common; microprolactinomas often cause sexual dysfunction, while macroprolactinomas may present with mass effects.

Conclusions:

  • Proper work-up of hypogonadal patients with suspected pituitary dysfunction is critical.
  • Evaluation may necessitate testing other pituitary hormones and pituitary MRI.
  • Referral to endocrinology or neurosurgery is important for complex cases or when surgical intervention is considered.