HSP90AA1 and nonpapillary renal cell carcinoma: To preliminarily clarify the expression characteristics of HSP90AA1 in ccRCC, we used data from 6 GSE datasets (GSE40435, GSE53757, GSE66272, GSE68417, GSE126964, and GSE105261) to compare the mRNA expression of HSP90AA1 between ccRCCs and their AN tissues, and the analysis results confirmed the low expression of HSP90AA1 in ccRCC (Fig. 1A).