Renal cell carcinoma
Right flank pain and hematuria in urine analysis test
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Large mass at upper pole of the right kidney which after contrast injection, heterogeneous enhancement is seen on both parenchymal and excretory phase. There is no evidence of collecting system or renal artery and vein involvement.
Renal oncocytoma is a relatively benign tumor and the importance of this lesion is the difficulty in pre-operatively distinguishing it from renal cell carcinomas.