Renal Cell Carcinoma antibody recognizes a 200 kDa glycoprotein localized in the brush border of the proximal renal tubule. This antibody immunoreacts with approximately 90% of Primary Renal Cell Carcinomas and approximately 85% of Metastatic Renal Cell Carcinomas. Other tumors that may react with this antibody are Parathyroid Adenoma, an occasional Breast Carcinoma. Nephroblastoma, Oncocytoma, Mesoblastic Nephroma, Transitional Cell Carcinoma, and Angiomyolipoma are not labeled with this antibody.