FIG 2. Progression of stenosis to near occlusion.

A, Anterioposterior angiogram shows ulcerated stenosis of the left carotid bulb. The normal ICA (larger arrow) beyond the stenosis is about twice the diameter of the ipsilateral distal ECA (smaller arrow).

B, Anterioposterior angiogram about 1 year later shows progression of stenosis to near occlusion with the left ICA (larger arrow) reduced in diameter in comparison to previous angiogram and close to the diameter of the ECA (smaller arrow).