Inferior Vena Cava Duplication: Demonstration by Computed Tomography

Abstract
The computed tomographic (CT) appearance of inferior vena cava (IVC) duplication in 2 patients are presented and the embryological, clinical and radiological significance are discussed. Knowledge of caval anomalies can prevent misinterpretation of mediastinal masses, iliac occlusion with venous collaterals or paravertebral lymph node enlargement. A duplicated IVC can be distinguished from para-aortic lymphadenopathy either by recognition of renal vein drainage or through intravenous contrast enhancement of the venae cavae.

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