The GTSE1 protein expression level with clinical and pathological characteristics in 154 breast cancer (cases including TNBC and non-TNBC were attached in Additional file 2: Table S5 and Additional file 3: Table S6 respectively) was analyzed, and these samples were divided into two groups by the median value of immunohistochemical scores as the cut-off value. The gene discussed is GTSE1; the disease is breast cancer.