Overexpression of miR526b and miR655 in luminal A breast tumor cell line MCF7 and HER2 positive SKBR3 promoted aggressive breast cancer phenotypes such as epithelial to mesenchymal transition (EMT), cell migration, invasion, induction of cancer stem cells (CSCs), tumor-associated angiogenesis, and lymphangiogenesis, oxidative stress, and hypoxia [[8], [9], [10], [11], [12]]. The gene discussed is ERBB2; the disease is neoplasm.