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目的：回顾性分析并探讨颅内后循环动脉瘤的临床表现和手术入路。方法：后循环动脉瘤２２例，占同期颅内动脉瘤的１０．３％，其中大脑后动脉瘤１２例，基底动脉瘤６例，脉络膜后动脉远端动脉瘤２例，小脑前下动脉和小脑后下动脉瘤各１例。１８例经显微手术，主要经翼点入路和颞下经小脑幕入路。结果：动脉瘤夹闭加切除１０例，孤立加切除６例，包裹２例，血管内治疗２例，２例未治。１８例优良，２例轻残，无手术死亡。结论：后循环动脉瘤大多瘤体较大，瘤内多含血栓。翼点入路对基底动脉远端、大脑后动脉Ｐ１－２段动脉瘤显露优良，颞下入路用于夹闭大脑后动脉Ｐ２－３段动脉瘤，显露优良。
Objective: To retrospectively analyze and discuss the clinical manifestations and surgical approaches of intracranial posterior circulation aneurysms. Methods: Twenty-two cases of posterior circulation aneurysms accounted for 10.3% of intracranial aneurysms in the same period, including 12 posterior cerebral aneurysms, 6 basilar aneurysms, 2 distal retinal artery aneurysms, 2 anterior inferior cerebellar arteries and Posterior inferior cerebellar aneurysm in 1 case. Eighteen patients underwent microsurgery mainly through pterional approach and infratemporal transimnus. Results: Aneurysm occlusion plus resection in 10 cases, isolated plus resection in 6 cases, 2 cases wrapped, endovascular treatment in 2 cases, 2 cases not cured. 18 cases were excellent, 2 cases were mild residual and no operative death. Conclusion: Most of the aneurysms of the posterior circulation are large with many thrombi in the tumor. Pterional approach to the distal basilar artery, posterior cerebral artery P1 - 2 aneurysm revealed excellent, infratemporal approach for the posterior cerebral artery P2 - 3 segment aneurysm, revealed excellent.