A Pathological Study on Arteriosclerosis of Carotid

The studies made by the elders of our department have revealed that the degree of advancement of sclerotic lesions in the arteries which are distributed in various organs and that of aortic sclerosis in the same indi-vidual are not necessarily parallel with each other. The same trend between the aorta and the carotid artery has been confirmed by the author's obse-rvation in which the degree of advancement of arteriosclerotic lesions was measured by applying the Gore's mathod to the aorta and the Thickening Index to the carotid artery. Particularly, arteriosclerosis of the siphon portion is further advanced in many cases than that of the aorta. The main lesion of the siphon portion is atheromatous lesion being followed by calcic deposit. Calcification may begin as early as at the age of 12 and it often results in calcic tubes. In the sinus portion where frequency of atheroma-tous lesion is the highest, complicated lesion or occlusion is common among the Occidentals. Contrarily, however, the author's investigation showed a low frequency of ulcer, calcification, thrombosis and complete occlusion