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Artery‐to‐Artery Thromboembolism in Cervicocephalic Arteries and Its Potential Roles in Development of Brain Infarction

Artery-to-artery embolism from atherosclerotic lesions of the proximal arteries has been increasingly recognized as one of the mechanisms inducing cerebral ischemic lesions such as TIA, amaurosis fugax, and certain kinds of stroke.' In the clinical study, however, artery-to-artery embolism is difficult to definitely diagnose, and thus, analysis of autopsy-proven cases is necessary to know the characteristics of artery-to-artery embolism and its potential role in development of brain infarcts. In the present study, we attempted to characterize not only the carotid arterial lesion as an embolic source, but also the brain lesions caused by atheromatous embolism.