FIG 2. Mixed-density plaque.

A, CT angiogram of the proximal internal carotid artery shows a predominantly intermediate-density plaque with foci of hypodensity (arrowheads). Curved arrow indicates internal jugular vein.

B, Corresponding histologic section shows an irregular slitlike lumen (Lu) separated by a reasonably thick fibrous cap (C) from a large necrotic core (N) comprising necrotic and lipid debris as well as thrombus. S indicates surgical incision.