Long-term anticoagulant treatment in patients with inferior vena cava agenesis and deep vein thrombosis.

Introduction: Inferior vena cava agenesis (IVCA) is a rare and underdiagnosed congenital anomaly that predisposes to deep vein thrombosis (DVT). Optimal duration of anticoagulant treatment in these patients is not well established.

Method: Observational retrospective study that included all consecutive patients older than 18 diagnosed with IVCA and DVT.