A 25-year-old male and his wife go to a fertility clinic for evaluation. His wife has no significant past medical history and is given a 'clean bill of health.' He has had bronchiectasis and a history of recurrent sinusitis, and was diagnosed with situs inversus as a child. He is found to be sterile. What is the most likely cause of his infertility?
- A)Abnormal levels of sphingomyelinase
- B)Hexosaminidase A deficiency
- C)Abnormal structure of ciliaGABARITO
- D)47, XXY karyotype
- E)Fibrillin deficiency
Explicação
The correct answer is B. Source: Kaplan USMLE Step 1 QBank — Biochemistry Test 2. Ver explicação completa e trilha adaptativa →