METTL14 and nonpapillary renal cell carcinoma: Given the results of correlation analysis based on TCGA cohort, METTL14 and YTHDC1 were the two most relevant m6A regulatory genes (Pearson’s r = 0.66), which indicated that the process of RNA m6A modification in ccRCC may be the result of combined action by m6A writer gene (METTL14) and reader gene (YTHDC1).