EPCAM and melanoma: Therefore, we have developed photoimmunotheranostic agents against three receptors that are strongly expressed in TNBC: the epidermal growth factor receptor (EGFR), the epithelial cell adhesion molecule (EpCAM) and chondroitin sulfate proteoglycan 4 (CSPG4) also known as melanoma-associated chondroitin sulfate proteoglycan (MCSP) [19–21].