MKI67 and breast cancer: 3MST showed higher transcript level in BC patients at age younger than 40 years old (P < 0.0001) (Fig. 2A), in pre-menopausal status (P = 0.0469) (Fig. 2B), expressing high Ki-67 (P = 0.0401) (Fig. 2C) and having large tumor size (≥ 5 cm) (P = 0.0187) (Fig. 2D).