人工塞栓術中，腫瘍内およびくも膜下出血をきたしたのう胞性髄膜腫の1例

Cystic Meningioma associated with Intratumor and Subarachnoid Hemorrhage during Embolization: A casereport

I．はじめに

　のう胞性髄膜腫の発生頻度は髄膜腫の1.2-4.2％程度であるといわれ，稀とされている^4,22）．また，髄膜腫由来の腫瘍性頭蓋内出血は文献上稀である^{1,9,11,14,21）}．

　われわれは腫瘍摘出術前の処置として行った人工塞栓術中，腫瘍内およびくも膜下に出血をきたしたのう胞性髄膜腫の1例を経験したので，その出血の発生機序について，考察を加え報告する．

We present a case of a cystic meningioma accom-panied with hemorrhage in a cyst and adjacent subarachnoid space that occurred while preoperative embolization in feeders for the tumor was being applied.

A 73-year-old male patient was admitted for a complaint of convulsion. Under CT examination, a tumor was observed at the left frontal convexity and found to be fed by the middle cerebral artery shown in the left cerebral angiograms. The tumor was diagnosed meningioma.

After removing the tumor, we conducted histologi-cal study.