窓形成した椎骨動脈の圧迫により副神経麻痺を来した1例

Accessory Nerve Paralysis due to Compression of the Fenestrated Vertebral Artery

I．はじめに

　脳血管造影法の手技が確立されて以来，種々の脳血管奇形が偶然に発見される機会が多くなってきたが，その中で椎骨動脈の窓形成は少なからず経験される脳血管奇形の1つである．

　われわれは窓形成した椎骨動脈が副神経を圧迫し，その結果胸鎖乳突筋の萎縮を来して斜頸となった極めて稀な1症例を経験したので，若干の文献的考察を加え報告する．窓形成そのものが神経症状発現に関与したという報告は見当たらず，本症例が第1例目と考える．

Neurological involvement due to fenestrated vertebral artery has not yet been reported, although fenestration formation by vertebral arteries is not rare. Reported here is one such rare case. In this case accessory nerve paralysis developed due to fenestrated vertebral artery.

A 51-year-old woman was admitted to our depart-ment with tilting of the head to the right side as her chief complaint. This had gradually developed over a period of approximately one year.