title: Canal wall for cholesteatoma: up or down? Long-term results.
mesh_terms: D002781:Cholesteatoma / Q000601:surgery*; D004427:Ear Diseases / Q000601:surgery*; D006801:Humans; D008416:Mastoid / Q000601:surgery; D011183:Postoperative Complications / Q000209:etiology; D012665:Semicircular Canals / Q000601:surgery; D014433:Tympanoplasty / Q000009:adverse effects / Q000379:methods*