Preservation of the cholesteatoma matrix in the modified radical mastoidectomy.
D000293:Adolescent; D002781:Cholesteatoma / Q000601:surgery*; D004428:Ear Neoplasms / Q000601:surgery*; D005260:Female; D006801:Humans; D008416:Mastoid / Q000601:surgery*; D014433:Tympanoplasty