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Intrinsic characteristics of each BRCA subtype, in terms of receptor expression profile, prognosis, treatment, percentage of incidence and metastasis distribution. Abbreviations: BRCA—breast cancer; CK—cytokeratin; ECM—epithelial to mesenchymal transition; ER—oestrogen receptor; ERBB2—human epidermal growth factor receptor-type 2; HER2—human epidermal growth factor 2; Ki 67—antigen Ki-67; PR—progesterone receptor; TNBC—triple-negative breast cancer.
