下位脳神経障害を呈さずに頭蓋内外に伸展した頸静脈孔髄膜腫の1例

A case of meningioma of the jugular foramen without disturbance of lower cranial nerves

I．はじめに

　髄膜腫は全脳腫瘍中23.3％であり，髄膜腫の中でテント下に発生するものは約10％（全脳腫瘍の2.3％）である．しかしながら，頸静脈孔部に発生する髄膜腫は極めて稀である^1,9,13）．今回，頸静脈孔部を介して頭蓋内外に伸展し，しかも下位脳神経障害が出現しなかった髄膜腫の1例を経験したので文献的考察を加えて報告する．

We report a case of meningioma with extracranial extension via the jugular foramen not accompanied by any disturbances of the lower cranial nerves. A 32-year-old female suffered from a headache without any other neurological abnormalites. She had no particular family or past history. The extracranial extending meningioma was removed at the first operation. The meningioma of the jugular foramen was removed at the second staged operation by transcondylar approach. A meningioma of the jugular foramen is rare, and the meningioma with extracranial extension via the jugular foramen without showing disturbances of lower cranial nerves has not been reported so far.