Achieving stringent complete remission in relapsed/refractory multiple myeloma with liver extramedullary disease after CAR‑T cell therapy: A case report

Multiple myeloma (MM) is a clonal plasma cell malignancy characterized by bone marrow infiltration and the presence of monoclonal proteins in the blood and urine. However, despite the advances that have been made in terms of its treatment, relapsed/refractory MM (RRMM) remains a significant challenge. Chimeric antigen receptor (CAR)-T cell therapy, which involves the engineering of T-cells to express CARs targeting specific antigens on tumor cells, has emerged as a promising therapeutic approach for RRMM. The present case report presents a patient with RRMM with liver extramedullary disease (EMD) who achieved stringent complete remission following CAR-T cell therapy. This case report highlights the efficacy of CAR-T cell therapy in treating RRMM, also discussing the patient's clinical course, treatment outcomes and side effects, and moreover, a review of the literature that focuses on the treatment of EMD using CAR-T cell therapy.