MKI67 and breast cancer: The BC characteristics of BRCA-mutated patients corresponded to what is described in literature [19, 20], with a significant higher number of poorly differentiated tumors (P=0.005), a significant number of triple-negative cancers (P=0.005) and higher Ki-67 expression (P=0.003) than in other patients (Table 1), which are all signs of the greater aggressiveness of the malignancy.