MKI67 and neoplasm: It is worth noting that a HER2 change, which was mostly a loss of staining, was significantly correlated with a decreased Ki67 index (15 vs. 3 in the no change/change group; p = 0.01) in t-CNB (Table 4), indicating a possible switch towards luminal A tumor characteristics and presenting a contrast to the increase of more aggressive triple negative tumors.