EvidenceRelapsed or refractory multiple myeloma

CARTITUDE-4 is the first randomised trial to show that a CAR-T improves survival in myeloma, and it moved cilta-cel into second-line use (FDA approval 2024). For patients whose disease returns after first-line lenalidomide, a one-off cell therapy now competes with continuous drug combinations. Capacity, cost and the need for bridging therapy still limit who actually receives it.

KarMMa-3 was the first randomised evidence that CAR-T beats conventional drugs in myeloma and led to ide-cel's approval after two prior lines. It confirmed that earlier use of CAR-T produces deeper and longer remissions than in the end-stage setting. Because responses are shorter than with cilta-cel and OS was not improved, it also sharpened debate about which BCMA CAR-T to use and when.

A second bispecific target beyond BCMA gives patients an option after BCMA-directed CAR-T or bispecifics have failed; it was approved in 2023.

Teclistamab showed that an off-the-shelf bispecific can approach CAR-T-like response rates in late myeloma, giving patients who cannot wait for or access cell therapy a real option. It also exposed the price: prolonged T-cell engagement causes profound immunosuppression, so infection prophylaxis and immunoglobulin replacement are now routine. Less frequent dosing after response is being adopted to reduce this burden.

The stage on a myeloma report, and the label of high-risk disease that drives intensified treatment and trial choice, comes from the R-ISS; the 2022 R2-ISS adds 1q gain.