NR1H4 and nonpapillary renal cell carcinoma: To further explore the effect of NR1H4 DNA methylation on ccRCC patients’ prognosis, we divided ccRCC patients into two groups according to the risk of NR1H4 DNA methylation, and the survival analysis demonstrated that ccRCC patients in the low-risk group had longer survival times (p < 0.05) in SurvivalMeth (Fig. 5D).