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Figure 1 Coronary plaque rupture. (A) Low-power view of a circumferential coronary plaque with fibrous cap rupture. Note the large necrotic core with numerous cholesterol clefts. There is a focal disruption of a thin fibrous cap (arrow) with an occlusive luminal thrombus (Movat Pentachrome, x20). (B) High-power view of the rupture site showing fibrous cap disruption (arrows); the thrombus shows communication with the underlying necrotic core (Movat Pentachrome, x400).