Tim, a 27-year-old man, has unusually narrow shoulders, low muscle mass, and has no facial and body hair. His doctor recently prescribed testosterone replacement therapy to him. Tim is most likely suffering from:
A) phenylketonuria (PKU).
B) cystic fibrosis.
C) Klinefelter syndrome.
D) Huntington's disease (HD).

Question

Quizplus · Accepted Answer

Tim's symptoms, including narrow shoulders, low muscle mass, and lack of facial and body hair, along with the prescription of testosterone replacement therapy, suggest he has Klinefelter syndrome. This condition is characterized by an extra X chromosome in males (XXY), leading to hypogonadism and the need for testosterone treatment.

Tim, a 27-Year-Old Man, Has Unusually Narrow Shoulders, Low Muscle