Epithelial‐to‐mesenchymal transition (EMT) is a crucial process in tumor metastasis defined by the conversion of epithelial tumor cells to cells with mesenchymal properties.[34] Here, we demonstrated that the expression of E‐cadherin, an epithelial marker, was reduced in HGC27 and AGS cell lines overexpressing DDR1, while the expression of mesenchymal markers, including N‐cadherin and vimentin, was increased (Figure 5d,e). The gene discussed is DDR1; the disease is neoplasm.