How large can a localized* renal cell carcinoma be and still be effectively treated via embolization. *There has been no renal vein or tumor membrane invasion, and no lymph node involvement. The tumor was discovered after sudden onset of back pain, nausea, vomiting, fever. Blood tests were done with a-symptomatic results. CT Scan revealed a very large tumor that has totally involved the kidney. Surgery is scheduled within two days.