Congenital absence of the oval window.
D001299:Audiometry; D003937:Diagnosis, Differential; D004423:Ear / Q000196:embryology; D004429:Ear Ossicles / Q000002:abnormalities* / Q000601:surgery; D004432:Ear, Middle / Q000002:abnormalities*; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D010040:Otosclerosis / Q000175:diagnosis*