COMMUNICATING ARTERY NOT VISUALIZED BY CEREBRAL ANGIOGRAPHY-REPORT OF FOUR CASES

摘要

Four cases of anterior communicating aneurysms are reported with clinical presentations of recurrent intracranial hemorrhage undisclosed in their cerbral angiography.Operative exploration revealed anterior communicating aneurysms in these patients.It is thought possible that these patients harbored aneurysms which failed to exhibit on angiograms due to temporary thrombosis or development of abnormal cerebral vessels.CT scanning was important for tdiagnosis of these patients.