As shown in Table 1, CCR2 expression has positive correlation with tumor invasion depth (P=0.006 and P=0.004, respectively), lymph node metastasis (P=0.038 and P=0.011, respectively) and TNM stage (P=0.003 and P=0.001, respectively) in the two independent sets, while it has no significant correlation with gender, age, tumor differentiation and Lauren classification in the two sets. The gene discussed is CCR2; the disease is neoplasm.