RBM15B and posterior cortical atrophy: To investigate the similarity and discrepancy of m6A regulator expression patterns between PCas, we first performed consensus clustering on 495 PCa samples from the TCGA PRAD dataset using 21 pre-defined m6A regulators (METTL3, METTL14, RBM15, RBM15B, WTAP, KIAA1429, CBLL1, ZC3H13, ALKBH5, FTO, YTHDC1, YTHDC2, YTHDF1, YTHDF2, YTHDF3, IGF2BP1, HNRNPA2B1, HNRNPC, FMR1, LRPPRC, ELAVL1).