Flanvotumab (IMC-20D7S) is a human monoclonal antibody targeting to tyrosinase-related protein (TYRP1), specifically expressed in melanocytes and melanoma cells. Flanvotumab acts function via natural killing-mediated antibody-dependent cell-mediated cytotoxicity (ADCC). Flanvotumab has potent anti-tumor activity and good tolerance[1].