Figure 1: Clear cell carcinoma of right kidney, grade □. (a) tMIP image: round strengthening shadow in dorsal side of right kidney, with clear boundary, and low density was shown in the eccentric necrotic area. (b) Lesions on perfusion map showed white high perfusion shadow, ROIT1: P: 143.33 ml/min/100g, PEI: 243.35 Hu, BV 42.72 ml/100g. (c) Pathological picture, HE × 200. Clear Cytoplasm was seen in tumor cells. The size of nucleus was similar. Nucleolus was seldom seen.