頭蓋内圧亢進症状で発症した静脈洞交会部hemangiopericytomaの1例

Increased Intracranial Pressure Caused by Obstruction of Torcular Herophili with Hemangopericytoma : a case report

I．はじめに

　Hemangiopericytomaは頭蓋内をはじめ全身のさまざまな部位に発生するが，頭蓋内では硬膜内静脈洞近傍に発生することが多い^5,6,12）．脳腫瘍が静脈洞近傍で増大すると，静脈洞を閉塞して頭蓋内圧亢進症状を呈することがある^7-9,14）．今回われわれは，頭蓋内圧亢進症状で発症した静脈洞交会部hemangiopericytomaを経験したので報告する．

A 49-year-old male had experienced diplopia for half a year. The intracranial pressure was markedly ele-vated (450 mmH₂O). Neuroimaging revealed a tumor incompletely occluding the torcular herophili and thebilateral transverse sinuses without cerebral or cerebellar compression by the tumor. Both cortical veinsand cervical veins were enlarged, and the Sylvian vein and Rabbe's vein and the tentorial sinus were col-lateral vessels. Biopsy was performed and histologic examination proved hemangiopericytoma. The patientunderwent Gamma-knife treatment and the tumor decreased in size 3 months after the treatment.