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On the portal venous phase, the tumour can be identified accurately as heterogeneous low density (red star) versus adjacent non-cancerous tissue (green star).
Intrahepatic arterioportal shunt secondary to HCC through the transvasal route 2: on the hepatic arterial phase, the vasa vasorum from the hepatic artery branch passes through the portal vein wall forming a thread-and-streak sign (pink arrow) at the tumor thrombus 1.