The miRNA expression patterns differ among different subtypes of breast cancer: the let-7c, miR-10a, and let-7f miRNAs are associated with luminal type A breast cancer; miR-18a, miR-135b, miR-93, and miR-155 have been shown to be related to the basal cell subtype; while miR-142-3p and miR-150 have been shown to be associated with the HER2-positive subtype (4); and miR-10b, miR-26a, and miR-153 have been used as potential biomarkers for triple negative breast cancer (TNBC) 5). The gene discussed is ERBB2; the disease is breast carcinoma.