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大脑后动脉动脉瘤较少见,占颅内动脉瘤的0.7-2.2％。由于大脑后动脉(PCA)位置深且与脑干及周围结构关系复杂,该区域的动脉瘤手术治疗困难。如何选择最佳手术入路需要了解该区详细的解剖关系,还需将不同位置的动脉瘤分段,确定入路与部位的关系。 Margolis最先提出将PCA分段,按照PCA在基底池走行的位置简单地分为大脑脚段、环池段和四叠体段。
Posterior cerebral artery aneurysms are rare, accounting for 0.7-2.2% of intracranial aneurysms. Due to the deep location of the posterior cerebral artery (PCA) and the complex relationship with the brainstem and surrounding structures, surgical treatment of aneurysms in this region is difficult. How to choose the best surgical approach requires understanding of the detailed anatomy of the area, but also need to segment the aneurysm in different locations to determine the relationship between the approach and the site. Margolis first proposed PCA segmentation, in accordance with PCA walk in the basal cistern position is simply divided into the brain segment, the Central pool segment and the four-segment.