Fig. 2.

A 33-year-old man with a dissection and occlusion of the right vertebral artery, resulting in a PICA infarction (patient 8). A, MR image shows partial right PICA infarction and a proximal basilar dissecting aneurysm. B, 3D angiogram in a frontal view demonstrates a large dissecting proximal basilar aneurysm with occlusion of the distal right vertebral artery (arrow indicates the stump) and narrowing of the distal right vertebral artery. C and D, Lateral view of a left vertebral angiogram before (C) and after (D) stent placement and coiling of the dissecting aneurysm.