METTL16 and nonpapillary renal cell carcinoma: As shown in Table 2, 15 m6A-related genes (including ALKBH, FTO, METTL3, METTL14, YTHDF2, YTHDC1, YTHDC2, ZC3H13, METTL16, KIAA1429, CBLL1, IGF2BP1, IGF2BP2, IGF2BP3, and RBM15) were significantly correlated to prognosis of ccRCC (P < 0.05).