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강보승,신진근,이원용,김종애 대한이비인후과학회 2002 대한이비인후과학회지 두경부외과학 Vol.45 No.4
An osteoblastoma is a rare, benign and vascular tumor of bone that comonly afects the vertebrae or the long bones. Histo-logicaly, it is characterized by numerous osteoblast cells and its occurrence in the temporal bone is extremely rare in the world thus far. A 17-year old woman was refered to us with an one-year history of tinnitus and decreased hearing in the right ear. CT (computerized tomography) scan showed a 2.5× 2× 1 cm sized, wel defined soft tissue mass with central heterogeneous high density lesion in the right temporal bone. T1 and T2-weighted MRI (magnetic resonance image) scan showed iso-signal trabeculae of various sizes and riming osteoblasts surounded by spreading vascular stromas. Preoperative arterial embolization was done because massive bleeding during operation was expected. We did partial resection of the tumor wih the open cavity mastoidectomy with type III tympanoplasty. She was in good shape and there was no evidence of neurological deficits or recurence after 17 months follow-up. We experienced an osteoblastoma of the temporal bone. So we present this case with literature reviews. (Korean J Otolaryngol 2002;45:393-8)