Objective To analyze the expression level of RunX2 gene in breast cancer patients and to investigate its relationship with patients' clinical characteristics and outcomes. Methods Tissue samples were selected from 75 breast cancer patients without radiation and chemotherapy before surgery. Immunohistochemistry was used to compare the expression level of RunX2 between cancer and para-carcinoma tissues. The relationship was analyzed between RunX2 expression and age,pathological type,postoperative stage,lymph ...