Kaplan-Meier survival curves (Figure 4A) show that patients with lower expression levels of 7 genes including BARX2, C2orf40, C4orf49, CYS1, GDNF, HLA-G and OTOA have better overall survival prognoses than those with higher expression levels of these 7 genes in ccRCC. Here, ECRG4 is linked to nonpapillary renal cell carcinoma.