Extensive Deep Venous Thrombosis in a Young Male Patient as the First Manifestation of a Rare Venous Anomaly – Inferior Vena Cava Duplication: Case Report

: Although venous thromboembolism (VTE) including deep venous thrombosis (DVT) and pulmonary embolism is a major health problem in the world, it is an infrequent disease among young people. It is always mandatory to look at the underlying conditions for VTE, and in young patients, inherited prothrombotic factors should also be evaluated, especially in case of unprovoked VTE. Anomalies of inferior vena cava (IVC) are very rare in the general population. In this case report we describe rare occurrence of extensive DVT in a young male patient with rare anomaly of IVC - duplication of IVC - as a predisposition factor for DVT. Physicians need to be reminded of the IVC anomalies that should be considered in young patients with idiopathic DVT of lower extremity, which may require extended anticoagulant treatment.