After excluding non-case–control or cohort study (n = 11), studies not relevant to BRMS1 (n = 6), studies with no correlation to breast cancer (n = 7), insufficient information in studies (n = 1), 12 articles were finally selected for this meta-analysis [16–27], including 1,263 patients with breast cancer. The gene discussed is BRMS1; the disease is breast carcinoma.