METTL13 and hepatocellular carcinoma: Therefore, this study used the Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) to elucidate the diagnostic value of serum METTL13 level in eHCC, as well as the prognostic function of METTL13 mRNA expression in cancer tissue for HCC, to identify potential targets for early diagnosis and treatment of HCC.