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Malignant invasion into the portal vein in a patient with liver cirrhosis and hepatocellular carcinoma. (a) Contrast-enhanced CT scans at the arterial phase showed thread-like enhancement within the thrombus, venous expansion, and disruption of vein walls (red arrows). (b) Contrast-enhanced CT scans at the portal venous phase showed venous expansion and disruption of vein walls (red arrows). CT, computed tomography.
