Atherosclerotic Subintimai Hematoma of the Carotid Artery

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Abstract
A presumed new radiological-pathological entity of atherosclerotic subintimal hematoma of the human carotid artery is described. Subintimal hematomas were found in 12 of 50 (24%) carotid bifurcations during surgery for repeated transient ischemic attacks in a single hemispheric distribution; only 33% were associated with ulcerations. The typical angiographic appearance was a sharply marginated, rounded, eccentric filling defect located near the extracranial carotid bifurcation, although occasionally it may simulate a typical smooth or even ulcerated atherosclerotic plaque. Pathological mechanisms responsible for the hemorrhage into the atherosclerotic plaque resulting in the hematoma are discussed.

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