側頭骨に発生したOssifying fibroma

Ossifying Fibroma of the Temporal Bone

I．はじめに

　ossifying fibromaは主に上顎骨や下顎骨に発生する比較的稀な良性線維性骨腫瘍であるが^3,4,6,12），ごく稀に頭蓋骨円蓋部に発生する^{2,5,10-13,15）}．一般に若年者に好発するが，われわれは76歳の女性の側頭骨に発生したossifying fibromaを経験したので，文献的考察を加え，ossifying fibromaの臨床像，放射線学的および組織学的特徴について述べる．

A case of ossifying fibroma of the cranial vault is described.

Several reports emphasized the rare existence of this lesion limiting in the cranial vault. The patient was a 76-year-old woman who suffered mild headache in the parietal region after a trivial head trauma. Physical and neurological examination were normal. Plain skull X-P revealed irregularly bordered, 4×4 cm sized radiolucent area in the left temporal bone. The bone scintigraphy using ^99mTc-MDP showed an abnormal uptake like a doughnut. Levels of serum P, Ca and alkaline phosphatase were within normal range.