title: Giant cell reparative granuloma of the petrous temporal bone: a case report and literature review.
abstract: Giant cell reparative granuloma (GCRG) is an unusual, benign bone lesion that most commonly affects the maxilla and mandible; skull involvement is rare. The etiology is uncertain but may be related to trauma. GCRG is difficult to distinguish from giant cell tumor of the bone and has a lower recurrence rate. Thirteen reports of temporal bone GCRG in 11 patients have been reported. One report of a petrous GCRG in a 3-year-old girl has been identified. A 38-year-old male presented with a 2-year history of fullness in his left ear, ipsilateral hearing loss, and intermittent cacosmia. Computed tomography and magnetic resonance imaging revealed a large left-sided anterior temporal extradural mass. The patient underwent a left frontotemporal craniotomy and resection of a left temporal fossa tumor that involved the petrous and squamous parts of the temporal bone. The patient's post-operative course was uneventful, except for increased hearing loss secondary to opening of the epitympanum. Follow-up at one month revealed no other problems. Histopathology of the specimen was consistent with a giant cell reparative granuloma.
authors.forename: J C
authors.initials: JC
authors.lastname: Williams
authors.forename: W E
authors.initials: WE
authors.lastname: Thorell
authors.forename: J S
authors.initials: JS
authors.lastname: Treves
authors.forename: M E
authors.initials: ME
authors.lastname: Fidler
authors.forename: G F
authors.initials: GF
authors.lastname: Moore
authors.forename: L G
authors.initials: LG
authors.lastname: Leibrock