Figure 1b: Transverse CT scans show solitary HCC in a 55-year-old overweight man with type 2 diabetes and abdominal pain. (a) Unenhanced scan shows large mass (arrows) in right lobe of the liver. The mass is faintly hyperattenuating to liver due to foci of hemorrhage. A central hypoattenuating necrotic area (arrowhead) is seen in the mass. (b) Contrast-enhanced scan obtained during hepatic arterial phase demonstrates heterogeneous enhancement of the tumor (arrows), with a central necrotic area. (c) Contrast-enhanced scan obtained during portal venous phase shows that the tumor (arrows) has persistent heterogeneous hyperattenuation compared with adjacent liver parenchyma.