Neurological Surgery 脳神経外科41巻12号

2013年12月発行

症例

Fusion imageを用いた前脈絡叢動脈の解剖学的variationの術前評価

著者： 青木靖子¹³ 遠藤英徳¹ 新妻邦泰² 井上敬¹ 清水宏明¹ 冨永悌二³

所属機関： ¹広南病院脳神経外科 ²広南病院血管内脳神経外科 ³東北大学脳神経外科

ページ範囲：P.1075 - P.1080

Ⅰ．はじめに

　前脈絡叢動脈（anterior choroidal artery：AchoA）には，豊富な解剖学的variationが存在する^{2,10,12-14,17)}．AchoA脳動脈瘤の外科治療では，虚血性合併症が4.4～16%に生じると報告され^5,7,8)，虚血領域はその解剖学的variationに依存すると考えられる^{1,2,10,12-14,17,18)}．したがって，術前に解剖学的variationおよび灌流領域を把握する必要があるが，AchoAに過形成や低形成，起始異常がある場合には，後交通動脈（posterior communicating artery：PcomA）との血管撮影上の鑑別が困難な場合もある^12,13)．今回，AchoAの解剖学的variationの術前評価に血管撮影とmagnetic resonance imaging（MRI）のfusion imageが有用だった未破裂脳動脈瘤2例を報告する．

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