[Ruptured ICPC junction aneurysm revealing angiographically only small bulging (author's transl)].

Two cases revealed only small bulging at ICPC junction on carotid angiogram after subarachnoid hemorrhage were reported. One case was treated conservatively and other was operated. The diagnosis and operative indication of these cases were discussed. The authors think that all of these cases, whether these bulging are classified angiographically as aneurysm or junctional dilatation, should be operated positively when CT scan shows high density area due to subarachnoid hemorrhage around them and there are no other findings inducing subarachnoid hemorrhage on angiograms.