In BLCA samples, the 20 genes with the highest mutation rate were TP53, TTN, KMT2D, MUC16, ARID1A, KDM6A, PIK3CA, SYNE1, RB1, HMCN1, FGFR3, RYR2, KMT2C, MACF1, EP300, FLG, FAT4, STAG2, ATM and OBSCN (Figures 4A–D). Here, PIK3CA is linked to bladder transitional cell carcinoma.