Abstract：Objective: To discuss the indications, techniques and complications of endovascular treatment of posterior circulation aneurysms. Methods: The clinical data of 33 cases of posterior circulation aneurysms treated by endovascular treatment was retrospectively reviewed. Results: Thirty-three cases were treated successfully. According to Raymond grading for the immediate occlusion of the aneurysm, grade I was obtained in 23, grade II in 6 and grade III in 4 cases. Of the 33 patients, 29 recovered well, 2 were mildly disabled, 2 were severely disabled and no one died after the treatment. All patients were in stable condition and no newly-developed neurological dysfunction was observed within 3～36 months except 1 rebleeding. Conclusion: Endovascular treatment is a minimally invasive, safe and effective method for posterior circulation aneurysms.
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