There were no significant differences between the ARL and USL groups in terms of various demographic and clinical characteristics, such as age, height, weight, menopausal status, family history of breast cancer, palpable symptom at the time of breast cancer detection, and histopathologic features (clinical stage, T stage, nodal status, hormone receptor [ER, PR] status, Her-2 status, KI-67 status, and histologic grade) (Table 1). This evidence concerns the gene MKI67 and breast cancer.