MKI67 and neoplasm: The comparison between the two groups showed that the proportion of axillary lymph nodes with stage N2 and above in group L was higher than the proportion in group H (31.8% vs. 9.2%, P = 0.007), but there was no meaningful difference in the distribution of age (P = 0.315), menopause status (P = 0.353), pathological type (P = 0.430), Ki-67 expression (P = 0.321), tumor size (P = 0.923), or surgical methods (P = 0.876) (P > 0.05).