側頭葉部脂肪腫の1例—症例報告と文献的考察

Intracranial Lipoma of the Temporal Lobe: Report of a case and review of literature

I．はじめに

　頭蓋内脂肪腫の頻度は比較的少ない．最近CT scanの出現により発見される機会がふえ，かなりまとまった症例数を集めた報告もみられるようになったが，脳梁部などの頭蓋正中構造に発生したものが多い．本例のように正中構造から離れた部位の頭蓋内脂肪腫の報告例はかなり稀のようで，その成因を考える上で興味深い，今回われわれは合側頭葉先端部に発生した頭蓋内脂肪腫の1例を経験したので，その発生基盤に関して若干の文献的考察を加えて報告する．

A 52-year-old female was admitted to our clinic with chief complaint of hadache since 2 months ago. Plain computed tomography (CT) revealed low density mass in her right temporal lobe beneath the sylvian fissure with mean Hounsfield number of -52. On admission, no neurological deficit was found. This low density mass had no enhancement region. No abnormal finding was seen in plain skull roentgeno-gram and right carotid angiography. No epileptic pattern was found electroencephalographically. Right fronto-temporal craniotomy and total removal of tumor was performed to confirm the histological nature of this tumor.