title: [Chondroma of the petrous bone. A contribution to differential skull base tumor diagnosis].
abstract: BACKGROUND
  Cartilaginous tumors of the mid-face and the skull base are rare.
  
  
  METHODS
  For the first time, a case report of a chondroma of the base of the ear in a 56-year-old woman is presented. In 1974 the patient developed a facial nerve paralysis while she was pregnant. Twenty-two years later the patient developed persistent headache and CT studies of the head were obtained, which showed an extensive tumorous lesion located at the base of the ear. A tumor was resected through an otoneurosurgical approach. The histological examination showed a chondroma.
  
  
  CONCLUSIONS
  Even the rare diagnosis of a chondroma should be considered for a differential diagnosis of skull base tumors.
authors.affiliation: Abteilung Hals-Nasen-Ohrenheilkunde, Kopf- und Halschirurgie Bundeswehrkrankenhaus Ulm.
authors.forename: M
authors.initials: M
authors.lastname: Tisch
authors.forename: K
authors.initials: K
authors.lastname: Hehl
authors.forename: K
authors.initials: K
authors.lastname: Kraft
authors.forename: U
authors.initials: U
authors.lastname: Kunz
authors.forename: H
authors.initials: H
authors.lastname: Maier
mesh_terms: D002812:Chondroma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003937:Diagnosis, Differential; D004428:Ear Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D005158:Facial Paralysis / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010579:Petrous Bone / Q000473:pathology / Q000601:surgery; D011247:Pregnancy; D019292:Skull Base Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed