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Figure 1. Images of a 1.1 cm-diameter well-differentiated hepatocellular carcinoma in segment IV of the liver in a 73-year-old man. (a) Abdominal ultrasound disclosed a hepatic tumour with high echogenicity (arrow). (b,c) The tumour was isodense to surrounding liver parenchyma in unenhanced (not shown), arterial-dominant phase (b) and portal venous phase (c) of dynamic CT and, as a result, could not be identified. (d) Photomicrograph of the needle biopsy specimen showed a well-differentiated hepatocellular carcinoma. Haematoxylin and eosin, original magnification x100.
