The canal wall up or down debate. The case for the canal wall down.
D002781:Cholesteatoma / Q000601:surgery; D004428:Ear Neoplasms / Q000601:surgery; D004432:Ear, Middle / Q000601:surgery*; D006801:Humans; D008416:Mastoid / Q000601:surgery; D008417:Mastoiditis / Q000601:surgery; D008722:Methods; D014433:Tympanoplasty / Q000379:methods