Despite we were unable to validate their association with ccRCC mortality, there were other prioritized genes among the top ranked that are interesting candidates for further study, namely GPR155, INPP5K, KRT7, CYP4B1 and the mucin encoding genes (MUC5B, MUC12, and MUC16). The gene discussed is CYP4B1; the disease is nonpapillary renal cell carcinoma.