外頸動脈—横静脈洞瘻の1例

ARTERIOVENOUS FISTULA BETWEEN THE EXTERNAL CAROTID ARTERY AND THE TRANSVERSE SINUS

I．緒言

　最近脳神経系の疾患の診断の重要な手段として血管撮影法が普及してきた結果，頭蓋内血管の異常がつぎつぎに明らかにされてきているが，われわれは脳腫瘍を思わせる急性脳圧亢進症状を呈し，頸動脈撮影により外頸動脈と横静脈洞間に動静脈瘻を認めた症例を経験したのでここに報告する。外頸動脈—静脈洞瘻は本邦では寺尾らの報告があるだけできわめてまれな症由例である。

A case of arteriovenous fistula between the external carotid artery and the transverse sinus with symptoms of intracranial hypertension, resembling brain tumor is reported.

A 43-year-old man had suffered from headache and visual disturbance for about a half year and he fell suddenly into unconsciousness following lumbar punc-ture.

Papiloedema existed in both eyes. Routine radiograms of the skull disclosed oval translucent area in the occipital bone. Left carotid angiograms revealed the markedly dilated and tortuous occipital artery. The transverse, straight, sigmoid and inferior sagittal sinus were visualized in arterial phase with granulated sha-dows in the occipital bone. Ligature of the external carotid artery performed successfully.

This case may be presumed to be a kind of arte-riovenous malformation in occipital bone.