CD38 and plasma cell myeloma: Other treatment options for multiple myeloma are cytotoxic chemotherapy, corticosteroids, immunomodulatory drugs (IMiDs), proteasome inhibitors (PI), nuclear export inhibitors, monoclonal antibodies (such as antibody drug conjugates [ADCs], and bispecific T‐cell engagers [BiTEs] targeting a wide range of proteins including CD38) and chimeric antigen receptor (CAR‐T) cell therapy [2].