PMC3617969_01
On 3D-CT, the IMV (arrow) and internal iliac vein (arrowhead) are identifiable as the feeding and drainage vessels, respectively, of the rectal varices.
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F1
Three-dimensional computed tomography (3D-CT) was used as a non-invasive method for the identification of rectal varices and thrombus in the extrahepatic portal vein (fig. 1, fig. 2).
Portography during balloon occlusion of the blood flow in the IMV demonstrates that the rectal varices (arrow) are supplied with backward blood flow by the IMV and flow into the internal iliac vein (arrowhead). The sclerosant was injected through the balloon catheter into the IMV.
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F3
After blood flow had been occluded by balloon inflation, anterograde venography was performed through the balloon catheter (fig. 3).