S100A4 and biliary atresia: In the EMT process biliary atresia besides a decline in the expression of CK-7 and CK-19, obtained also a decrease other markers of epithelial cells (E-cadherin) and an increase in markers of mesenchymal cells such as N-cadherin vimentin, FSP-1, α-SMA, fibronectin [10,13,20,21,29].