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Related Experiment Videos

Endocrine studies in primary hypogonadism.

H Ross, J Hasen, R M Boyar

    Hormone Research
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Primary hypogonadism in adolescents may initially show normal hormone levels. Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) elevations may only appear after central nervous system (CNS) puberty onset.

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    Area of Science:

    • Pediatric Endocrinology
    • Reproductive Medicine
    • Human Genetics

    Background:

    • Investigating primary hypogonadism in adolescent males presenting with delayed puberty and short stature.
    • Evaluating the hypothalamic-pituitary-gonadal axis, including hormonal profiles and testicular function.

    Observation:

    • Two 15-year-old boys exhibited prepubertal luteinizing hormone (LH), follicle-stimulating hormone (FSH), and testosterone levels.
    • Testicular biopsies revealed prepubertal testes with limited germinal cell maturation.
    • Patients displayed somatic features suggestive of Noonan syndrome but had distinct karyotypes (XY and xyq-).

    Findings:

    • Serial hormonal studies in one patient demonstrated a progression from normal early pubertal LH secretion to a pattern indicative of primary testicular failure.

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  • Elevated LH and FSH levels, characteristic of primary hypogonadism, were not consistently apparent until post-central nervous system (CNS) puberty onset.

    • Implications:

    • Suggests that hormonal evaluation for primary hypogonadism in adolescents requires consideration of the timing relative to CNS puberty.
    • Highlights the complex interplay between genetic factors, testicular function, and hormonal regulation in pubertal development.
    • Underscores the importance of longitudinal monitoring in diagnosing and managing primary hypogonadism.