The results of the correlation analysis between the 4 MMR proteins and clinical characteristics showed that prognostic indicators such as age, TNM staging, histological type, and lymph node metastasis had a significant correlation with the 4 MMR proteins, which suggested that the expression of MMR protein may have a certain relationship with prognosis. The gene discussed is MRC1; the disease is metastatic malignant neoplasm in the lymph nodes.