下部脳底動脈幹動脈瘤に対するPosterior subtemporal transtentorial approach

Posterior Subtemporal Transtentorial Approach for a Lower Basilar Trunk Aneurysm

Ⅰ．はじめに

　下部脳底動脈幹動脈瘤の頻度は高くなく，従来noman's landといわれたこの領域の脳動脈瘤に対する直達手術は，容易ではない．

　このたび，著者らは，くも膜下出血（以下SAHと記す）後，左外転神経不全麻痺を呈した下部脳底動脈幹動脈瘤を，Posterior subtemporal transtentorial approachで手術し，治癒せしめ得たので，ここに，手術方法，ならびに，一過性に出現した健忘性失語（amnesstic aphasia）に対する考察を加えて報告する．

A lower basilar trunk aneurysm is rare and it has been difficult to operate on this kind of aneurysm which is located in so-called "no man's land".

We have recently operated on the aneurysm which was located between the vertebrobasilar junction and the origin of AICA.