<Case Report>Cerebellar Infarctions Secondary to Cranio-Cervical Anomalies : A Case Report

Abstract

We report a case of cerebellar infarctions which occurred in the territories of the bilateral posterior inferior cerebellar arteries. This case was complicated with cranio-cervical anomalies composed of assimilation of the atlas, atlanto-axial dislocation, and basilar impression. The 40-year old male patient had no detectable risk factors predisposing to atherosclerotic arterial occlusion or cardiogenic embolism, and there were no angiographic findings of atherosclerosis. It was, therefore, postulated that the cerebellar infarctions were secondary to those cranio-cervical anomalies. The developing mechanism is discussed.

両側の後下小脳動脈領域におこった小脳梗塞の1例(40歳, 男性)を報告する本例には環椎癒合, 環軸脱臼, さらに頭蓋底嵌入症という3つの頭蓋頸椎移行部先天奇形が合併していた. 動脈硬化性動脈閉塞や心原性塞栓などをおこしうる危険因子は検索しえなかった. このため, 本例の小脳梗塞は, 頭蓋頸椎移行部の先天奇形を基盤として生じたものと思われた. 発生機序につき詳細に検討した.