No statistically significant differences were observed in terms of menopausal status (p = 0.898), histological grade (p = 0.175), Ki67 IHC scores (p = 0.092 using a 14% cut-off) and percentage of stromal tumor-infiltrating lymphocytes (TILs) (p = 0.218), although TILs’ levels were differently distributed according to HER2 IHC levels (p = 0.033) and were higher in HER2 2+ (median: 5; interquartile range [IQR] 1–5) compared to 1+ (median: 1; IQR 1–5; p = 0.035) and 0 (median: 1; IQR 1–5; p = 0.035). Here, MKI67 is linked to neoplasm.