Posterior Fossa Cerebral Revascularization─OA-AICA and OA-PICA Bypass: Technical Note

Abstract

Dolichoectatic and fusiform aneurysms of the posterior circulation represent a small subset of cerebral aneurysms and are often among the most difficult to treat. Various revascularization procedures are frequently performed. Among these techniques, occipital artery (OA) to posterior inferior cerebellar artery (PICA) anastomosis is the most frequently used. Thus, it is important to refine this surgical technique. In this technical note, we summarize optimized techniques of OA preparation and bypass for successful OA-PICA and OA to anterior inferior cerebellar artery (AICA) anastomoses.