title: Pathogenesis of attic cholesteatomas.
mesh_terms: D002781:Cholesteatoma / Q000209:etiology*; D004427:Ear Diseases / Q000209:etiology*; D004428:Ear Neoplasms / Q000150:complications; D004432:Ear, Middle / Q000473:pathology; D004814:Epidermal Cyst / Q000150:complications; D005064:Eustachian Tube; D006801:Humans; D008679:Metaplasia