SERPINH1 and nonpapillary renal cell carcinoma: Importantly, consistent with iTRAQ results, WB and tissue microarray (TMA) staining results from the independent ccRCC set (Fig. 2B and C) and IHC results from the THPA data set (Fig. S5C) further verified the up‐regulated protein level of SERPINH1 in ccRCC tissues.