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Myeloma

Multiple myeloma: comparison of two dose-intensive melphalan regimens (100 vs 200 mg/m2)

Abstract

Several trials have shown the superior impact of high-dose melphalan (usually 200 mg/m2, MEL200) vs standard therapy in myeloma patients. Intermediate-dose melphalan (100 mg/m2, MEL100) is also superior to the standard dose, but has not been clinically compared with MEL200. A total of 90 patients at diagnosis were treated with two MEL100 courses. Their clinical outcome was compared with that of a control group of 90 pair mates matched for serum β2-microglobulin levels and Durie and Salmon clinical stage. These patients were treated at diagnosis with two MEL200 courses. Patient characteristics were similar in both groups except that the median age of the MEL100 group was significantly higher (P<0.0001). Complete remission was 35% after MEL100 and 48% after MEL200 (P=0.08). Median event-free survival (EFS) was 32 months in the MEL100 group and 42 months in the MEL200 group (P<0.005), but overall survival (OS) was not different. Transplant-related mortality was not significantly different. Haematological and extra-haematological toxicity was significantly reduced after MEL100. Despite the significant age difference, tandem MEL100 was less toxic than tandem MEL200, and MEL100 was inferior to MEL200 in terms of EFS but not in terms of OS. The intensified nonmyeloablative MEL100 regimen is an effective first-line treatment.

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Acknowledgements

This work was supported in part by Associazione Italiana Ricerca Cancro (AIRC), Associazione Italiana Leucemie (AIL), Compagnia di San Paolo and Ministero Università e Ricerca Scientifica e Tecnologica (MURST). We thank Miss Tiziana Marangon for her technical assistance in the preparation of manuscipt. We also thank the many medical and nursing colleagues who have participated in the treatment of patients.

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Correspondence to M Boccadoro.

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Palumbo, A., Bringhen, S., Bertola, A. et al. Multiple myeloma: comparison of two dose-intensive melphalan regimens (100 vs 200 mg/m2). Leukemia 18, 133–138 (2004). https://doi.org/10.1038/sj.leu.2403196

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