Summary Introduction Venous anatomy may present significant variability, with a wide incidence of venous tributaries, duplicate or accessory veins related to saphenous veins. The recognition and identification of these variations are important in the therapeutic management of these patients, and vascular ultrasonography is the method of choice in the evaluation of the peripheral venous system. Objectives To evaluate the association between anatomic variance of the great saphenous vein (VSM) and venous insufficiency of the lower limbs in patients with primary […]