Figure 1.

Multiphase computed tomography (CT) on admission showing juvenile hepatocellular carcinoma that developed in a normal liver. a) Image taken before the administration of contrast medium shows a tumor in the S4 segment of the liver. b-d) Findings of contrast-enhanced CT. A solid hepatic mass is seen in the S4 segment of the liver. The uptake of the contrast agent in the hepatic arterial phase (b) is strong, with subsequent washout in the portal venous phase (c) and the equilibrium phase (d).