小脑后下动脉动脉瘤(PICCA)是临床中比较少见且处理困难的一种疾病。小脑后下动脉的行程复杂且解剖变异大。PICCA的手术入路主要有枕下远外侧入路及经髁凹入路,在PICA的近端及过渡段行动脉瘤孤立术或夹闭载瘤动脉需行血管重建术。部分小脑后下动脉动脉瘤可行血管内介入治疗。手术治疗及血管内介入治疗两者都有相应的适应症及并发症,目前还不能互相替代。 Posterior cerebellar artery aneurysm (PICCA) is a rare clinical and treatment of a disease. The posterior inferior cerebellar artery has a complex stroke and large anatomical variations. PICCA surgical approach mainly suboccipital distal approach and by the condyle concave approach, in the proximal and transitional segment of PICA aneurysm isolation or clipping of the parent artery need vascular revascularization. Part of the posterior inferior cerebellar artery aneurysm feasible endovascular intervention. Surgical treatment and endovascular treatment of both have corresponding indications and complications, the current can not replace each other.