Venous insufficiency in a young man secondary to a traumatic arteriovenous fistula.

The medical history in a young man who developed varicose veins and venous insufficiency secondary to an acquired arteriovenous fistula in the thigh is presented. The radiological and clinical findings are discussed. The disease process in the development of varicose veins is not fully understood and cannot be satisfactorily explained as a consequence of arterial pressure within the venous system or a defect in the venous valves alone. The widespread ectatic changes seen within the venous system in our patient suggests the activation of an unknown, possibly humoral factor, resulting in morphological modifications in the vein wall.