Objective: Treatment for ruptured dissecting aneurysms of the vertebral artery (VA) varies according to the origin of the posterior inferior cerebellar artery (PICA). However, a PICA originating from the V3 segment has not been reported.
Conclusion:Considering the origins of the PICA and anterior spinal artery (ASA) is important when selecting treatment for hemorrhagic vertebral artery dissecting aneurysm. The morphological features of aneurysms, such as that described herein, are challenging, and perforated vessels might become occluded and initiate ischemic complications.