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Portal vein tumor thrombus. Axial noncontrast (A) and postcontrast arterial (B) and portal venous (C) phase T1 three‐dimensional gradient‐echo fat‐saturated MR images demonstrate a hypointense lesion in the right lobe of the liver (arrowhead), consistent with hepatocellular carcinoma. An enhancing tumor thrombus is seen in the adjacent portal vein (C) (arrow).
