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Fig. 3B. —Understaging of hepatocellular carcinoma on helical CT in 62-year-old man. Corresponding portal phase CT scan shows that both lesions remain hyperdense relative to liver parenchyma. Lesion in caudate lobe abuts right diaphragmatic crus and obliterates focally retrohepatic fat plane (arrows). These findings were missed preoperatively. At surgery, gross extrahepatic tumor infiltration was found and complete resection was not possible.