A 32-year-old man presents with infertility and decreased libido. Vital signs: BP 118/76, HR 72, RR 14, Temp 37°C. Semen analysis reveals markedly decreased sperm motility with normal count. Testicular biopsy shows normal spermatogenesis. Transrectal ultrasound excludes ductal obstruction. He denies fever or genitourinary infections. An epididymal biopsy would most likely demonstrate which histologic finding?
- A)Stratified squamous epithelium with mucous glands
- B)Simple columnar epithelium with cilia and highly folded mucosa
- C)Pseudostratified epithelium with stereociliaGABARITO
- D)Simple cuboidal epithelium surrounding colloid-filled follicles
- E)Transitional epithelium with umbrella cells
Explicação
The epididymis is lined by pseudostratified epithelium with stereocilia. It is the site of sperm maturation and storage, so pathology here can affect motility even when spermatogenesis in the testis is intact. The key clue is infertility with normal testicular... Ver explicação completa e trilha adaptativa →