title: Giant cell granuloma of the temporal bone: a case report.
abstract: OBJECTIVE
  Giant cell granuloma (GCG) is a rare nonneoplastic bone lesion that occurs mostly in the jawbones; few cases arise in the remainder of the skull, including the temporal bone. Previously, giant cell lesions of the temporal bone were regarded as giant cell tumours (GCT). The importance of distinguishing GCG from GCT lies in the presumed difference in prognosis; GCTs have higher rates of recurrence, metastasis, and malignant transformation.
  
  
  METHODS
  We describe the case of a 12-year-old child with temporal bone GCG extending to the middle cranial fossa. The patient underwent a subtotal petrosectomy via retroauricular approach, associated with resection of the zygomatic process.
  
  
  RESULTS
  No evidence of recurrence was found 36 months later.
  
  
  CONCLUSIONS
  The diagnosis of GCG was based on clinical history, histology, imaging, and response to treatment. The patient was treated with the standard surgical approach, and has a good outcome at three years follow-up.
authors.affiliation: Audiology Unit, University of Ferrara, Italy.
authors.forename: R P
authors.initials: RP
authors.lastname: Ortore
authors.forename: R
authors.initials: R
authors.lastname: Bovo
authors.forename: A
authors.initials: A
authors.lastname: Ciorba
authors.forename: S
authors.initials: S
authors.lastname: Ceruti
authors.forename: A
authors.initials: A
authors.lastname: Martini
mesh_terms: D001301:Audiometry, Pure-Tone; D001844:Bone Conduction; D001847:Bone Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D002648:Child; D003937:Diagnosis, Differential; D018212:Giant Cell Tumor of Bone / Q000175:diagnosis; D006101:Granuloma, Giant Cell / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D006314:Hearing Loss, Conductive / Q000209:etiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010579:Petrous Bone / Q000601:surgery; D013701:Temporal Bone / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed