title: Giant air cell of the petrous apex: a possible cause of facial hypalgesia.
abstract: A giant air cell of the left petrous apex was found in a 23-year-old man with ipsilateral facial hypalgesia. The size of the giant air cell depicted on computed tomography was 1.5 x 2.0 x 2.0 cm. A coronal T1-weighted magnetic resonance image showed that the trigeminal nerve was compressed superomedially by a large signal void area that was probably a result of excessive pneumatization of the petrous apex. It is suggested that the facial hypalgesia was caused by the compression by the giant air cell of the petrous apex on the trigeminal nerve.
authors.affiliation: Department of Otolaryngology, Tokyo Hospital, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sato
authors.forename: M
authors.initials: M
authors.lastname: Sakai
authors.forename: T
authors.initials: T
authors.lastname: Kaga
authors.forename: M
authors.initials: M
authors.lastname: Iida
authors.forename: T
authors.initials: T
authors.lastname: Ogata
authors.forename: H
authors.initials: H
authors.lastname: Miyake
authors.forename: T
authors.initials: T
authors.lastname: Watabe
mesh_terms: D000328:Adult; D000388:Air; D005145:Face / Q000294:innervation*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009408:Nerve Compression Syndromes / Q000175:diagnosis / Q000209:etiology*; D009422:Nervous System Diseases / Q000209:etiology; D010579:Petrous Bone / Q000000981:diagnostic imaging / Q000473:pathology; D012677:Sensation; D014057:Tomography, X-Ray Computed; D014276:Trigeminal Nerve