ERBB2 and invasive ductal breast carcinoma: Needle biopsy revealed a diagnosis of invasive ductal breast carcinoma (cT4bN0M0 cStageIIIB, estrogen receptor 50%, progesterone receptor 70%, human epidermal growth factor receptor 2 [HER2] 1 + , Ki67 26.16%), but most of the tissue was necrotic.