To determine whether DDX17 is upregulated in human HCC tissues, we first compared DDX17 mRNA levels of DDX17 between HCC and normal tissues in different online databases, including the Cancer Genome Atlas (TCGA), International Cancer Genome Consortium (ICGC) and Gene Expression Omnibus (GEO; GSE45267). This evidence concerns the gene DDX17 and hepatocellular carcinoma.