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The aortic-valve cusp contains atheromatous plaque (arrow) along its aortic aspect (top left and right panels, ×20). The circumflex coronary artery is severely stenotic as a result of chronic atherosclerosis and acute, nonocclusive thrombosis (middle left and right panels, ×12). The thoracic aorta contains a shallow intimal plaque (arrowhead) (bottom left panel, ×12; bottom right panel, ×20).
