BRMS1 and breast cancer: The expression of BRMS1 protein in metastatic breast cancer tissue was found to be lower than that of non-metastatic breast cancer tissue (OR = 0.20, 95%CI = 0.13–0.29, P<0.001), and the expression of BRMS1 protein in TNM stages 1 and 2 was higher than TNM stages 3 and 4 (OR = 4.62, 95%CI = 2.77–7.70, P<0.001) by means of the meta-analysis used.