Hepatic perfusion in cavernous transformation of the portal vein: evaluation by using CT angiography

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Dilatation of the small periportal veins sometimes occurs when the main trunk of the extrahepatic portal vein is obstructed, creating hepatopetal collateral pathways that carry blood from the portal vein to the liver. This results in a condition termed cavernous transformation of the portal vein. To our knowledge, few detailed studies have been done to examine the intrahepatic distribution of blood supplied through such collateral pathways via the liver hilum. The authors performed CT angiography during the arterial and portal phases in a case of cavernous transformation to evaluate in detail the hepatic distribution of arterial and portal blood. The blood distribution could be mapped clearly and divided into three main areas supplied, respectively, by the hepatic artery, the portal vein, and both vessels.

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