Wolffian duct cyst.
D000015:Abnormalities, Multiple; D003456:Cryptorchidism / Q000150:complications; D003560:Cysts / Q000151:congenital* / Q000196:embryology; D006801:Humans; D007223:Infant; D007668:Kidney / Q000002:abnormalities; D008297:Male; D014564:Urogenital Abnormalities; D014649:Vas Deferens / Q000002:abnormalities; D014928:Wolffian Ducts