急性硬膜下血腫にて発症した円蓋部髄膜腫の1例

A Case of Acute Subdural Hematoma Associated with Convexity Meningioma

I．はじめに

　脳腫瘍由来の頭蓋内出血の多くは転移性腫瘍や悪性グリオーマによるものであり，髄膜腫による出血はまれである．今回，われわれは円蓋部髄膜腫に起因する急性硬膜下血腫の1例を経験した．そこで，本症例の出血機序を中心に文献的考察を加えて報告する．

A 61-year-old normotensive woman was admitted to our hospital with complaints of severe headache andnausea. She has had a limp clue to the poliomyelitis in her childhood. Three days before admission, she had a headache without unconsciousness.

On admission, she was almost alert. Her vital signs were normal. A mild monoparesis of the atrophic right lower extremity was evident. This impairment was due to her past poliomyelitis. There were no other motor palsy, sensory loss, nuchal rigidity, and papilledema. A plain CT scan showed a crescent high density zone adjacent to a round high density mass in the left con-vexity.