FIG 1. Case 2.

A, Right vertebral angiogram on day 1, anterolateral view, shows no abnormal findings.

B, Follow-up right vertebral angiogram on day 7 shows a dissecting aneurysm in the vertebral artery, distal to the PICA origin.

C, Right vertebral angiogram immediately after embolization of the dissection site.

D, Follow-up MR angiogram 7 months after embolization.