FIG 1. A 34-year-old woman presenting with neck pain and right arm numbness after jogging. A lateral view from an acute left common carotid angiogram (A) demonstrates flame-shaped occlusion of the proximal left internal carotid artery consistent with acute dissection. An anteroposterior intracranial view from an acute right internal carotid angiogram (B) shows good cross-filling through the anterior communicating artery.