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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).
