Presigmoid-transmastoidealアプローチによる脳底動脈—前下小脳動脈動脈瘤のネッククリッピング

Neck Clipping of an Aneurysm at the Basilar Artery-Anterior Inferior Cerebellar Artery via Presigmoid-transmastoideal Approach

I．はじめに

　脳底動脈—前下小脳動脈動脈瘤（BA-AICA AN）は，稀なもので，その解剖学的位置から，通常の手術アプローチではネッククリッピングが困難な場合がある^8）．BA—AICA ANに対して，presigmoid-transmastoidealアプローチを用いてネッククリッピングを行った．

　このアプローチの手技を述べ，その利点と問題点について考察を加える．

A 51-year-old man presented severe disturbance of consciousness and massive subarachnoid hemorrhage. Angiography disclosed an aneurysm at the ventral bifurcation of the basilar and anterior inferior cerebellar arteries.

Neck clipping and additional wrapping/coating were performed via the presigmoid-transmastoideal approach with successful result.

The operative procedure was described and advan-tages of this approach were discussed.