To explore the relationship between MMP7 protein expression and patient clinical characteristics, we analyzed the connection between the expression quantity and patient clinical features, and found that elevated MMP7 expression was associated with lymph node metastasis (P = 0.0418, Table 3), but had not significant correlation with tumour stage, differentiation. The gene discussed is MMP7; the disease is metastatic malignant neoplasm in the lymph nodes.