Abstract
Purpose of Review
With rapid advances in the therapeutic landscape and biological insights in multiple myeloma, it is critical to identify and strategically manage high-risk patients to achieve best outcomes with currently available drugs. The purpose of this review is to summarize the management of high-risk myeloma with a focus on recent advances in the field.
Recent Findings
The most widely accepted definition of “high-risk” is the Revised International Staging System (R-ISS) stage 3 disease, which includes high tumor burden (ISS stage 3) and high-risk FISH cytogenetics or an elevated lactate dehydrogenase level. A major advance in the management of high-risk patients is insight into the importance of achieving and sustaining minimal residual disease (MRD) negativity, which is an influential equalizer for long-term outcomes. Quadruplet pre-transplant induction regimens incorporating an anti-CD38 monoclonal antibody (mAb), proteasome inhibitor (PI: bortezomib or carfilzomib), lenalidomide, and dexamethasone should be strongly considered in high-risk patients given higher odds of getting to MRD negativity with these regimens compared to triplets. In transplant-eligible patients, upfront transplant does lead to a higher rate of sustained MRD negativity and superior PFS compared to delayed transplant. The role of tandem transplant in the context of bortezomib-lenalidomide-dexamethasone (VRD) induction therapy is unclear. Post-transplant maintenance therapy should include lenalidomide in combination with either bortezomib or carfilzomib until progression. For transplant-ineligible patients, VRD or daratumumab-lenalidomide-dexamethasone (DRD) until progressions are both reasonable and choice should be individualized based on patient-related factors.
Summary
Outcomes of high-risk myeloma patients have improved in the last decade with the use of modern 3-drug induction regimens incorporating a PI and an immunomodulatory drug, with potential for further improvement as we bring anti-CD38 mAb upfront. MRD assessment will play a major role in treatment modification at several key time-points in the future such as pre-transplant, pre-maintenance, and yearly on maintenance therapy.
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Marneni, N., Chakraborty, R. Current Approach to Managing Patients with Newly Diagnosed High-Risk Multiple Myeloma. Curr Hematol Malig Rep 16, 148–161 (2021). https://doi.org/10.1007/s11899-021-00631-7
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DOI: https://doi.org/10.1007/s11899-021-00631-7