Renal Cell Carcinoma- Prognosis via Albumin Levels Metastatic renal cell carcinoma (mRCC) - An Introduction Renal cell carcinoma (RCC) constitutes approximately 90% of all urologic malignancies. Approximately 30% of patients with RCC present with metastatic disease, and amongst those with localized disease, a substantial proportion will recur. Before 2005, immunotherapy with interleukin-2