The analysis of literature and data obtained by the authors validate the necessity to recognize early atherosclerosis as a specific form of low limb vascular lesions. The latter are characterized by the presence of autoimmune inflammation in the vascular wall. The authors believe peripheral nonspecific aortic arteritis to be an early form of obliterating atherosclerosis also. Definite diagnosis will contribute to greater efficacy of therapies and help to make an adequate prognosis of the disease course.