Fig. 2From: Venous anomalies and thromboembolisma Coronal CT venogram shows hypoplastic and acutely thrombosed infrarenal IVC (arrow) with contrast taking path of mature iliolumbar and lumbar collateral veins (arrow head). The suprarenal IVC is patent (asterisk). b Venogram after thrombolysis shows restoration of flow to the infrarenal IVC which remains hypoplastic (arrow)Back to article page