Chimeric antigen receptor T-cell (CAR-T) therapy for the treatment of multiple myeloma (MM) has fundamentally changed the relapsed and refractory therapeutic landscape, but the disease remains incurable. Two CAR-T products, idecabtagene vicleucel (ide-cel; Abecma) and ciltacabtagene autoleucel (cilta-cel, Carvykti), have been FDA- and EMA-approved for the treatment of relapsed/refractory MM (RRMM); both target B-cell maturation antigen (BCMA), a surface glycoprotein highly expressed on MM cells. Despite deep and durable responses following CAR-T therapy, most patients will need subsequent treatment, and the optimal next-line therapy is presently unclear. Commentary on: Liu et al. Outcomes in patients with multiple myeloma receiving salvage treatment after BCMA-specific CAR-T therapy: A retrospective analysis of LEGEND-2. Br J Haematol 2024;204:1780-1789.
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