Letter: Congenital absence of vasa.
D000013:Congenital Abnormalities / Q000150:complications; D003550:Cystic Fibrosis / Q000150:complications; D006801:Humans; D007248:Infertility, Male / Q000209:etiology*; D008297:Male; D013733:Testicular Diseases / Q000150:complications; D014649:Vas Deferens / Q000002:abnormalities*