Interestingly, while HIF1α and HIF2α expression in ccRCC exhibited an opposed behavior (Fig. 7), the increased expression of either HIF1α or HIF2α in ccRCC appears to be associated with a favorable patient survival rate (Fig. 8), although in the case of HIF1α, it is not significant (Fig. 8A). Here, HIF1A is linked to nonpapillary renal cell carcinoma.