报告大脑后动脉动脉瘤(PCAA)5例,占同(?)颅内动脉瘤的4.0%。PCAA 的临床特点(1)易形成巨大动脉瘤,约占80%;(2)临床表现以 SAH 最多见,且也常有局灶性症状,如偏瘫、动眼神经麻痹、同向偏盲等;(3)CT 常可见大脑脚旁或颞叶内侧占位病变;(4)常伴有胎儿型大脑后动脉(PCA)。最佳治疗是经颞下入路将动脉瘤夹闭或切除。对 PCA 的显微外科解剖、手术方法和并发症也进行了简要的讨论。 Reported 5 cases of posterior cerebral artery aneurysm (PCAA), accounting for 4.0% of intracranial aneurysms. The clinical features of PCAA (1) easy to form a huge aneurysm, accounting for about 80%; (2) the most common clinical manifestations of SAH, and also often have focal symptoms, such as hemiplegia, oculomotor nerve paralysis, (3) CT often visible in the foot of the brain or medial temporal lesions; (4) often accompanied by fetal cerebral artery (PCA). The best treatment is through the inferior temporal artery aneurysm clipping or excision. A brief discussion of microsurgical anatomy, surgical methods and complications of PCA was also conducted.