MKI67 and neoplasm: It showed that compared with HER2neg TNBC patients, HER2low patients were more prone to have larger tumor size (P = 0.04), lymph node involvement (P = 0.02), higher status of Ki67 (P < 0.001) and higher histological grade of lesions (P < 0.01); however, HER2neg TNBC patients were more likely to be diagnosed at a younger age (< 45 vs. ≥ 45 years, P = 0.03, OR (95% CI) = 1.97 (1.09–3.57); Table 1).