外傷性硬膜下水腫の経過観察中に水頭症を来した1例

A Case of Hydrocephalus in Follow-up of Post-traumatic Subdural Effusion

Ⅰ．はじめに

　外傷性硬膜下水腫は自然寛解することが多い一方，慢性硬膜下血腫へ移行する例も数多く存在することはよく知られている．今回われわれは外傷性硬膜下水腫の経過観察中に水頭症を来した稀な1例を経験したので報告する．

　We report an interesting case of hydrocephalus following traumatic subdural effusion. A 50-year-old male was diagnosed as a traumatic subdural effusion. Three months later, he was transferred to our hospital again because of conscious disturbance and incontinence. Emergent CT showed characteristic hydrocephalus. The lateral ventricle and the third ventricle were remarkably enlarged. After Ventriculo-peritoneal shunt, the symptoms and radiographical findings were resolved.

　Both the compression of arachnoid villi around the superior saggital sinus and stenosis of the aqueduct by subdural effusion could be associated with the cause of hydrocephalus in this case.