We examined how MMD expression levels correlated with various clinicopathological characteristics of gastric cancer, including clinical stage, Lauren classification, tumor differentiation, patient sex, gastric perforation, clinical treatment, and human epidermal growth factor receptor 2 (HER2) expression with respect to overall survival (OS) (Figure 2A)and first progression (FP) (Figure 2B) in gastric cancer patients. The gene discussed is ERBB2; the disease is gastric cancer.