Fig. 1

The cut surface of the mass was bright golden yellow with areas of gray-white fibrosis and hemorrhage (a). A separate small nodule was present in the lower pole, measuring 1.2 × 1.0 × 0.6 cm (b). Microscopic findings of clear cell renal cell carcinoma (c). High-power view of clear cell renal cell carcinoma (d). Microscopic findings of papillary renal neoplasm with reverse polarity (PRNRP) (e). High-power view of PRNRP (f)