FIG 1. A 48-year-old man with occipital headaches, neck pain, and Wallenberg's syndrome.

A, Selective angiogram of the left VA shows typical aspect of stenotic dissection with a long stenosis (arrows) involving the V3 and V4 segments of the VA.

B, Early follow-up conventional angiogram, obtained at 4 months, shows a normal left VA (arrow) with complete resolution of luminal abnormalities.

C, Contrast-enhanced MR angiogram, obtained 29 months later, shows normal appearance of the left VA (arrow).