脳梗塞及びクモ膜下出血を呈した脳主幹動脈のdolichoectasiaの1症例

Cerebral Infarction and Subarachnoid Hemorrhage Caused by Dolichoectasia: Report of a case

I．はじめに

　脳主幹動脈のdolichoectasiaは、一般に脳虚血症状，または頭蓋内占拠性症状で発症することが多く^{2,3,5-7，14）}，その破裂によるクモ膜下出血は少ないとされている^1,2,6,14）．今回，われわれは本症と診断されてから4年後に脳梗塞を呈し，直後にクモ膜下出血にて不慮の転帰をとった症例を経験したので，若干の文献的考察を加えて報告する．

Dolichoectasia usually causes neurological symptoms because of the pressure it exerts on adjacent intracra-Mal structures and/or impaired circulation distal to ectasia. However, it rarely induces subarachnoid hemor-rhage.

The authors report just such a rare case of dolichoec-tasia, which caused subarachnoid hemorrhage following extensive cerebral infarction distal to ectasia. On October 18, 1982, a 47-year old man came to our hospital with dementia which had started 7 days be-fore, as his chief complaint.

Neurological examinations revealed no positive find-ings.