Primary clear cell carcinoma in the liver: CT and MRI findings

Figure 1 Primary clear cell carcinoma of the liver in a 47-year-old woman. A: On pre-contrast computed tomography scan, the mass shows slight hyper-attenuation with a hypo-attenuation halo (arrows); B: At hepatic arterial phase, the mass shows early enhancement; C: At the equilibrium phase, the mass presents hypo-attenuation with rim enhancement (arrows); D: At portal venous phase, the reconstructed coronal image shows the mass with a discontinuous liver capsule (arrows) at Segment VI, indicating tumor rupture, which was surgically confirmed; E: Pathologically, the mass shows a pseudocapsule (arrows) (HE, × 100).

Figure 2 Primary clear cell carcinoma of the liver in a 29-year-old man. A: On T1WI, the mass shows slightly hypo-intense signals (arrows); B: At portal venous phase, the mass presents with rim enhancement (pseudocapsule); C: Pathologically, the mass is mainly composed of clear cells (HE, × 200); D: Pathologically, the mass shows a pseudocapsule (HE, × 100).

Figure 3 Primary clear cell carcinoma of the liver in a 62-year-old man. A: On pre-contrast computed tomography scan, the mass shows hypo-attenuation (arrows); B: At hepatic arterial phase, the mass shows early enhancement; C: At portal venous phase, the mass shows hypo-attenuation and thin rim enhancement (pseudocapsule); D: Microscopically, the mass is mainly composed of clear cells (HE, × 200).