颅内动脉瘤(intracranial aneurysm)是由颅内动脉内腔的局限性异常扩张所致动脉壁的一种瘤状突起,是一种常见的血管性疾病,临床常以自发性蛛网膜下腔出血(subarachnoid hemorrhage,SAH)为首发症状。据2009年Mayo Clinic的最新研究报告,未破裂动脉瘤在人群中患病率约为2%,而动脉瘤破裂造成蛛网膜下腔出血的年发病率大约为6～10/10万人口。SAH导致脑血管痉挛、脑水肿、脑梗死和脑积水等多种病 Intracranial aneurysm (intracranial aneurysm) is caused by the limitations of intracranial arterial lumen abnormal expansion of a tumor-like process of the tumor wall is a common vascular disease, often clinically with spontaneous subarachnoid hemorrhage (subarachnoid hemorrhage, SAH) as the first symptom. According to the latest Mayo Clinic 2009 study, the prevalence of unruptured aneurysms is about 2% in the population, and the annual incidence of subarachnoid hemorrhage due to aneurysm rupture is about 6-10 / 100,000. SAH causes cerebral vasospasm, cerebral edema, cerebral infarction and hydrocephalus and other diseases