This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pathology
This is a specimen of nephrectomy, what is your diagnosis? 
Select and explain. 
A. Renal cell carcinoma, B. Renal papillary adenoma, C. Urothelial cancer of renal pelvis, D. Oncocytoma
A: Renal cell carcinoma
Answer: A: Renal cell carcinoma 
Explanation: 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