Most tumors were invasive ductal carcinoma (86.1%) and showed favorable biology such as histological grade I or II (77.2%), nuclear grade 1 or 2 (66.3%), luminal/HER2(−) (71.8%), and low Ki-67 labeling index (L.I.)(55.0%). This evidence concerns the gene MKI67 and invasive ductal breast carcinoma.