A 16-year-old boy is brought to the physician by his mother for a well-child examination. He recently stopped attending his swim classes. The patient is at the 97th percentile for height and the 50th percentile for weight. Examination shows decreased facial hair, bilateral breast enlargement, and long extremities. Genital examination shows scant pubic hair, small testes, and a normal-sized penis. Further evaluation will most likely show which of the following sets of findings in this patient?

Question

Quizplus · Accepted Answer

Eductional Objective: Klinefelter syndrome (47,XXY) causes infertility characterized by primary hypogonadism (elevated FSH and LH, low testosterone) and azoospermia.  Other findings include long lower extremities; small, firm testes; and gynecomastia.

A 16-Year-Old Boy Is Brought to the Physician by His