上小脳動脈末梢部嚢動脈瘤の1例

Aneurysm Arising from the Cortical Branch of the Superior Cerebellar Artery: Case report

I．はじめに

　後頭蓋窩の脳動脈瘤で上小脳動脈末梢部に発生するものは比較的稀であり，今まで約20例の報告を見るに過ぎない^4）．最近われわれは右上小脳動脈のcorticalbranchに発生した破裂脳動脈瘤を手術する機会を得たので，若干の文献的考察を加えて報告を行う．

　We reported a case of a 64-year-old man who presented a subarachnoid hemorrhage due to rupture of an aneurysm arising from the cortical branch of the superior cerebellar artery (SCA) at the junction of the superior vermian branch and the hemispheric branch. Eight days after the rupture, neck clipping of the aneurysm was performed successfully using the occipital transtentorial approach in a prone position, and the patient's postoperative course was uneventful. This rare case of aneurysm arising from the cortical branch of SCA was discussed with a review of literature.