Based on PAM50 gene expression signature, breast cancer is categorized into six ‘'intrinsic’’ subtypes namely, Luminal A, Luminal B, HER2-enriched, Claudin-low, Basal-like, and Normal-like [2, 3, 4], of which, Basal-like type has poor prognosis [5]. Here, ERBB2 is linked to breast carcinoma.