According to the KM plots based on TCGA database, ccRCC patients with lower CEACAM1 expression exhibited shorter overall survival (OS), progress-free interval (PFI), and disease-specific survival (DSS) (all P < 0.001) (Figures 3(a)–3(c)). The gene discussed is CEACAM1; the disease is nonpapillary renal cell carcinoma.