title: [Cholesterol granuloma of the petrous apex--etiology, diagnosis and therapy].
abstract: BACKGROUND
  In the past cholesterol granuloma has been described as an innocuous disease in the mastoid air cells related to an obstruction of the air source to a normally pneumatized cavity due to chronic inflammation. Cholesterol granuloma of the petrous apex has since been recognized as a distinct clinical entity that may cause severe cranial nerve problems and which thus demands adequate surgical treatment.
  
  
  METHODS
  Diagnosis and surgical management are discussed on the basis of two typical case studies and a review of the literature.
authors.affiliation: Abteilung für Hals-Nasen-Ohrenheilkunde, Kopf-Hals-Chirurgie, Bundeswehrkrankenhaus, Ulm.
authors.forename: K J
authors.initials: KJ
authors.lastname: Lorenz
authors.forename: G
authors.initials: G
authors.lastname: Hamer
authors.forename: W
authors.initials: W
authors.lastname: Sator
authors.forename: H
authors.initials: H
authors.lastname: Maier
mesh_terms: D000328:Adult; D001301:Audiometry, Pure-Tone; D018424:Cholesteatoma, Middle Ear / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D002784:Cholesterol; D003937:Diagnosis, Differential; D006099:Granuloma / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010579:Petrous Bone / Q000473:pathology / Q000601:surgery; D011183:Postoperative Complications / Q000209:etiology; D014057:Tomography, X-Ray Computed
chemical_list: D002784:Cholesterol
vernacular_title: Cholesterolgranulom der Pyramidenspitze--Atiologie, Diagnostik und Therapie.