三叉神経痛にて発症した中頭蓋窩Arachnoid cystの1例

A Case of Arachnoid Cyst in the Middle Cranial Fossa presenting with Trigeminal Neuralgia

I．はじめに

　最近われわれは中頭蓋窩くも膜嚢腫に合併した三叉神経痛に対し，cystoperitoneal shuntを施行して三叉神経痛を治癒せしめ得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．

A 50-year-old man had been suffering from left trigeminal neuralgia for 30 years. CT scan revealed an arachnoid cyst occupying the anterior two-thirds of the left middle cranial fossa. Cerebral angiography showed elevation of the left middle cerebral artery and medial shift of the left posterior cerebral artery.Metrizamide CT showed that the cyst was not com-municating with the subarachnoid space. Air CT revealed the root of the left trigeminal nerve in contact with the arachnoid cyst. The patient became completely free from the trigeminal neuralgia 6 months after cystoperitoneal shunt.