[Agenesis of the femoral vein in the framework of vascular dysplasias of the lower limbs. Clinical case].

Venous dilatations of the lower limbs, especially if associated with others abnormalities, may reflect pathogenetic mechanisms far more complex and diverse than plain insufficiency of the sephena, all the way to congenital vascular anomalies of all possible types and still dubious classification. In such conditions a prerequisite of prime importance is the complete exploration of the whole arterial and venous vasculature of the limb, first of all in order to avoid rash therapeutic decisions, and then to help clarify the diagnosis and select the most appropriate treatment from among the numerous technics available.