DKK2 and hepatocellular carcinoma: Reports on the level of miR-197-3p in HCC seem contradictory, but it is worth paying attention to the up-regulation of the level of miR-197-3p in metastatic HCC, which results in a decrease in the level of negative regulators of the WNT/β-catenin pathway (AXIN2, NKD1, DKK2) in HCC clinical tissues (Hu et al. 2018a).