<s>[INST] 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. [/INST] helloThanks for query.Only treatment option for large Renal Cell Carcinoma involving whole kidney is Radical Nephrectomy.Renal Cell Carcinoma of even a small size  can not be treated by embolization.Go ahead and get surgery done .Dr.Patil. </s>