the study employed a total of 31 kidneys surgically removed for the presence of a variety of tumors , including 11 unilateral wilms ' tumors , two cases of bilateral wilms ' tumors , 13 renal cell carcinomas , two congenital mesoblastic nephromas , one renal oncocytoma , one neuroblastoma metastatic to the kidney , and one clear cell sarcoma of the kidney .
C0022646
kidney
C0334488
clear cell sarcoma of the kidney