Problems in tympanoplasty.
D002781:Cholesteatoma / Q000601:surgery; D004427:Ear Diseases / Q000601:surgery; D004431:Ear, External / Q000601:surgery; D004432:Ear, Middle / Q000601:surgery; D006801:Humans; D008416:Mastoid / Q000601:surgery; D008722:Methods; D014433:Tympanoplasty