We also found that gastric tumor tissues expressed significantly higher Bmi-1, and Bmi-1 overexpression correlated with lymph node metastasis, or clinical stage, which was accordance with the results in in vitro study that knockdown of Bmi-1 expression was accompanied by decreased transformed phenotype and migration ability in gastric cancer cell lines [33]. The gene discussed is BMI1; the disease is gastric neoplasm.