Univariate Kaplan–Meier survival curves for CHL1 and PTPRG both indicated that the OS of ccRCC patients was significantly shorter in the low-expression group than in the high-expression group using the Gepia online tool (http://gepia.cancer-pku.cn/index.html) (Figure 11C). The gene discussed is CHL1; the disease is nonpapillary renal cell carcinoma.