前交通動脈瘤をともなった一側内頸動脈完全欠損の1例

A Case of Complete Absence of the Left Internal Carotid Artery associated with an Aneurysm of the Anterior Communicating Artery

Ⅰ．はじめに

　最近，著者らは12歳女子のくも膜下出血例において，脳血管撮影および開頭手術によって前交通動脈瘤を有するとともに左側の内頸動脈が欠損していることを確認しえたが，本例のような一側内頸動脈欠損例は文献上33例にすぎなく，しかも先天性脳動脈瘤との合併例は6例にすぎないので本例を報告するとともに文献的考察を加える．

The internal carotid artery is one of the most stable arteries and it's absence is very rate. The authors reported a case of a 12 year-ole-girl who suffered from a subarachnoid hemorrhage and who found to have an aneurysm arising from the anterior communicating artery and absence of the left internal carotid artery.

This patient was admitted to Department of Neurological Surgery, Sapporo Medical College and Hospital, with the object of detail examination for her subarachnoid hemorrhage experienced one and half month before admission.

On admission, no neurological abnormality was observed.