determined the miRNA profiles in circulating exosomes of BC patients using quantitative miRNA array, emphasizing that several miRNAs were differently expressed in exosomes of either HER2-positive or triple-negative breast cancer (TNBC) patients compared with healthy women, such as miR-27a/b, miR-335, miR-365, miR-376c, miR-382, miR-422a, miR-433, and miR-628 (20). Here, ERBB2 is linked to breast cancer.