In response to FGF9, FGFR3‐IIIb overexpressing hepatoma/hepatocarcinoma cell lines formed even larger clones than the vector controls (Figure S14), while FGF9‐treated cells with overexpressed FGFR3‐IIIc showed an elevated migratory phenotype, as indicated by the wound‐healing and transwell assay (Figure 4). This evidence concerns the gene FGF9 and hepatocellular carcinoma.