This is a specimen of nephrectomy, what is your diagnosis?

Oncocytoma, Renal papillary adenoma are benign tumors. (you need not do nephrectomy) In Urothelial cancer of renal pelvis, the tumor is in the renal pelvis (here it&;s in the periphery) This is a specimen of RCC- Clear cell typeClear cell carcinomas most likely arise from proximal tubular epithelium, and usually. occur as solitary unilateral lesions. They are bright yellow-gray-white spherical masses of variable size that disto the renal outline. The yellow color is a consequence of the prominent lipid accumulations in tumor cells.One of the striking characteristics of renal cell carcinoma is its tendency to invade the renal veinRef: Robbins Pathology; 9th edition; Page no: 954