Apart from our study on exosomal miR-373 in the serum of breast cancer patients [23] and the study on EpCAM-specific exosomal miR-200a, miR-200b and miR-200c in the serum of EOC by Taylor and Gercel-Taylor [30] and as far as we know, our study analyzed miR-373, miR-200a, miR-200b and miR-200c in exosomes secreted into the blood serum of cancer patients for the first time. Here, EPCAM is linked to breast cancer.