HNF4A and neoplasm: Ls174T-dnTCFdox transplanted in vivo displayed TCF target inhibition to the same level as Ls174T-dnTCFdox transplanted in vitro when compared with untreated cell controls, but this did not have an impact on tumor growth: tumors resulting from Ls 174T-dnTCF4dox cells or parental Ls174T cells with or without dox treatment showed similar growth curves and tumor appearance.