ERBB2 and triple-negative breast carcinoma: Besides this, four main molecular subtypes such as Luminal A (HR+/HER2-) (accounting 71%), triple negative breast cancer: TNBC (HR-/HER2-) (accounting 12%), Luminal B (HR+/HER2+) (accenting 12%) and HER2-enriched (HR-/HER2+) (accounting 5%) have been described.