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Figure 1 Panel A shows a cross-section of the epicardial coronary artery, demonstrating a thin fibrous cap (arrowheads) overlying a crescentic, lipid-rich core (x30). Panel B, with a higher magnification of the margin of the cap, demonstrates dense infiltration by foamy macrophages (x300) (Hematoxylin and eosin). Copyright 2002, Massachusetts Medical Society. All rights reserved. N Engl J Med 1997;336:1276–82.