Furthermore, Exo also contain some specific proteins that mirror the cell type from which they originate, such as epithelial cell adhesion molecule (EpCAM) [46,47], melanoma antigen recognized by T cells 1 (Mart-1) [48,49], human epidermal receptor (HER) (breast cancer, and pancreatic cancer origin) [50,51,52]. Here, EPCAM is linked to breast carcinoma.