RYR2 and hepatocellular carcinoma: The top 20 mutant genes with high mutation frequency found in 360 HCC patients from TCGA database included TP53, TTN, CTNNB1, MUC16, propagated, PCLO, APOB, RYR2, ND5, CSMD3, OBSCN, ABCA13, ARID1A, CACNA1E, LRP1B, XIRP2, ALMS1, SPTA1, RYR1 and HMCN1.