Reproductive Case Histories - Case 30

Parents were concerned about their 16-year-old son for the following reasons: he had no deepening of his voice, scanty pubic and axillary hair growth, absence of beard and mustache growth, small penis, poor muscular development, and psychosocial immaturity.

Laboratory evaluation indicated the following:
Serum testosterone 100 ng/dL
Sperm count 10 million/mL semen
The following tests were performed:

This person was subsequently treated with FSH at 25-75 U three times/week and HCG as described above. Sperm count and testosterone levels were both near normal after two months of treatment, and primary and secondary sex characteristics appeared.

1. What is the endocrine disorder in this individual?

2. Is this a primary or secondary disorder? Why?

3. Why is HCG used in the treatment?

4. Why would both FSH and HCG be needed in the treatment?

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