Diabetic arterial disease, showing gangrene and ulcerations of the toes. Although it is unusual in other atherosclerotic peripheral vascular diseases, this condition is a serious threat in diabetes. A hand is shown taking the dorsal pedis pulse.Diabetic arterial disease, showing gangrene and ulcerations of the toes. Although it is unusual in other atherosclerotic peripheral vascular diseases, this condition is a serious threat in diabetes. A hand is shown taking the dorsal pedis pulse.