Lenalidomide-prednisone induction followed by lenalidomide-melphalan-prednisone consolidation and lenalidomide-prednisone maintenance in newly diagnosed elderly unfit myeloma patients

P Falco, F Cavallo, A Larocca, D Rossi, T Guglielmelli, A Rocci, M Grasso, M L M Siez, L De Paoli, S Oliva, S Molica, R Mina, F Gay, G Benevolo, P Musto, P Omedè, R Freilone, S Bringhen, A M Carella, G Gaidano, M Boccadoro, A Palumbo
Leukemia 2013, 27 (3): 695-701
This multicenter phase II trial evaluated the safety and efficacy of lenalidomide-prednisone (RP) induction, followed by lenalidomide-melphalan-prednisone (MPR) consolidation and RP maintenance in elderly unfit newly diagnosed myeloma patients. Patients received four 28-day RP induction courses (lenalidomide 25 mg/day on days 1-21 and prednisone 50 mg three times/week), followed by six 28-day MPR consolidation cycles (melphalan 2 mg, prednisone 50 mg three times/week and lenalidomide 10-15 mg/day on days 1-21), and maintenance with lenalidomide (10 mg/day on days 1-21 every 28 days) plus prednisone (25 mg three times/week). Forty-six patients were enrolled. Median age was 75 years, 59% of patients had at least one comorbidity and 35% at least two. Partial response rate was 80%, including 29% very good partial response. Median time to progression was 19.6 months, median progression-free survival was 18.4 months and 2-year overall survival was 80%. At the tolerated consolidation dose (melphalan 25 mg/month and lenalidomide 10 mg/day), the most frequent grade 3 adverse events were neutropenia (36.4%), anemia (12.1%), cutaneous reactions (18.2%) and infections (12.1%). Grade 4 neutropenia occurred in 12.1% of patients. In conclusion, RP induction followed by MPR consolidation and RP maintenance showed a manageable safety profile, and reduced the risk of severe hematological toxicity in unfit elderly myeloma patients.

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