“Complete Venous Shutdown:” A Rare Case of Combined Superior Vena Cava (SVC) and Inferior Vena Cava (IVC) Occlusion

Figure 2

Interventional radiology venogram. Venogram demonstrating occlusion of the central portion of the left brachiocephalic vein with collateral flow from the peripheral remnant of the left brachiocephalic vein (white arrow) into a prominent collateral of the hemiazygos vein (black arrow) bypassing the occluded superior vena cava. Collateral flow from the left brachiocephalic vein can also be seen entering the left lower posterior intercostal vein (blue arrow). The inferior vena cava is indicated by the red arrow.