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Related Experiment Videos

Hypophyso-gonadal function in the cryptorchid child: differences between unilateral and bilateral cryptorchids

Cacciari, A Cicognani, P Pirazzoli

    Acta Endocrinologica
    |September 1, 1976
    PubMed
    Summary

    Bilateral cryptorchidism in boys is associated with lower testosterone levels after human chorionic gonadotropin (HCG) stimulation. Testosterone levels correlate with bone age in normal and unilateral cryptorchid boys, but not bilateral ones.

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    Area of Science:

    • Pediatric Endocrinology
    • Reproductive Medicine
    • Andrology

    Background:

    • Cryptorchidism, the failure of testes to descend, affects male reproductive health.
    • Assessing testicular function is crucial for understanding hormonal imbalances in boys.
    • Human chorionic gonadotropin (HCG) stimulation is a common method to evaluate Leydig cell function.

    Purpose of the Study:

    • To evaluate gonadal function in normal, unilateral cryptorchid, and bilateral cryptorchid boys.
    • To compare plasma testosterone and estradiol-17beta levels before and after HCG administration.
    • To assess the response to gonadotropin-releasing hormone (LH-RH) and its correlation with bone age.

    Main Methods:

    • Hormonal assays (testosterone, estradiol-17beta) performed before and after a 3-day HCG (2000 IU daily) intramuscular injection regimen.

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  • Luteinizing hormone-releasing hormone (LH-RH) test conducted on 22 normal, 33 unilateral, and 14 bilateral cryptorchid boys.
  • Correlation analysis between hormone levels, bone age, and cryptorchid status.

    • Main Results:

    • Plasma estradiol-17beta levels were below assay sensitivity (<5 pg/ml) in 60% of all boys.
    • Basal plasma testosterone levels were similar across groups; however, after HCG, bilateral cryptorchids showed significantly lower testosterone than controls.
    • Testosterone levels correlated with bone age in normal and unilateral cryptorchid boys, but not bilateral ones. LH and FSH levels showed no significant differences between groups.

    Conclusions:

    • Bilateral cryptorchidism is associated with impaired Leydig cell response to HCG stimulation.
    • Testosterone production and its correlation with bone age differ based on cryptorchid status.
    • LH-RH test responses did not significantly differ, suggesting the primary issue lies in testicular response rather than pituitary stimulation in cryptorchidism.