ALK and anaplastic large cell lymphoma: The fact that CD74 ligation induces cell death of ALCL cells and enhances the cytotoxic effects of chemotherapeutics or the ALK inhibitor crizotinib in ALCL cell lines, as well as the efficient killing of CD74-positive ALCL cell lines by a CD74-targeting antibody-drug conjugate, all point to the exploration of CD74 as a therapeutic tool for ALCL.