[Congenital defect of the conduction apparatus as a cause of middle ear deafness].
D003638:Deafness / Q000209:etiology*; D004432:Ear, Middle / Q000002:abnormalities*; D034381:Hearing Loss; D006314:Hearing Loss, Conductive; D006801:Humans
DEAFNESS/etiology; EAR, MIDDLE/abnormalities