As tumor cell migration has an important role in the development of metastatic disease, a classic wound healing assay was used to quantify the migration of the AGS cells into the scratched area (i.e., wound) without and with low dose of 50 μM H2O2, for 24 h and 48 h alone or combined with the ErbB system inhibitors, as compared to the control cells. This evidence concerns the gene EGFR and metastatic neoplasm.