Fig. 4
From: The inferior vena cava: anatomical variants and acquired pathologies
Duplicated IVC with asymmetrical caliber and bridging vein. a Contrasted-enhanced coronal CT shows a duplicated IVC (asterisk) of smaller caliber compared to the orthotopic IVC, that approaches and subsequently drains into the left renal vein (arrow). b Axial CT image shows a bridging vein (arrow) connecting paired common iliac veins (arrowheads) positioned anterior to the L4 vertebral body and posterior to common iliac arteries