SNAI1 and breast cancer: The Zhang P. et al. meta-analysis results suggested that TWIST1 and SNAIL1 were prognostic factors for BC, with the pooled HR values of 2.07 (95% CI = 1.63–2.68) and 1.63 (95% CI = 1.33–1.99), respectively, indicating that TWIST1 may be a favorable prognosticative indicator of poor prognosis in MBC39.