The thick vas deferens and the subfertile male.
D000328:Adult; D006801:Humans; D007248:Infertility, Male / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D012552:Schistosomiasis / Q000150:complications / Q000473:pathology; D014649:Vas Deferens / Q000473:pathology