Calcification of the Carotid Siphon

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Abstract
Calcification of the carotid siphon was studied microscopically and by x-ray. Calcification occurred chiefly in subintimal atherosclerotic plaques and in smaller amounts in the elastica and media. Calcification of the elastica impeded plaque formation. Calcification of plaques may impede their growth. Siphon calcification correlated positively with cerebral, carotid and aortic atherosclerosis, but the scatter for individual cases was great. Siphon calcification increased with age and was greater in hypertension and in women. Siphon calcification correlated with the occurrence of thrombotic strokes. It did not correlate with calcification elsewhere in the body or with the occurrence of myocardial infarction.