Isatuximab (anti-CD38) is a monoclonal antibody targeting the transmembrane receptor and extracellular enzyme CD38.Isatuximab induces tumor cell killing via fragment crystallizable (Fc)-dependent or Fc-independent mechanisms, including antibody-dependent cellular cytotoxicity (ADCC), antibody-dependent cellular phagocytosis (ADCP), and complement-dependent cytotoxicity (CDC)[1].