To assess whether ECT2 expression could predict the prognosis of breast cancer patients, we conducted pooled analysis and found that higher ECT2 mRNA level related to shorter OS (Pooled HR = 1.37, 95%CI 1.19–1.58) (Fig. 7A) and RFS (Pooled HR = 1.17, 95%CI 1.03–1.33) (Fig. 7B). This evidence concerns the gene ECT2 and breast cancer.