Journal
LEUKEMIA
Volume 32, Issue 2, Pages 383-390Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/leu.2017.211
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Funding
- Dutch Cancer Foundation
- German Federal Ministry of Education and Research
- Janssen-Cilag-Ortho Biotech [MMY3003]
- Novartis
- Amgen [P2004-0060]
- Chugai
- Roche
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The Dutch-Belgian Cooperative Trial Group for Hematology Oncology Group-65/German-speaking Myeloma Multicenter Group-HD4 (HOVON-65/GMMG-HD4) phase III trial compared bortezomib (BTZ) before and after high-dose melphalan and autologous stem cell transplantation (HDM, PAD arm) compared with classical cytotoxic agents prior and thalidomide after HDM (VAD arm) in multiple myeloma (MM) patients aged 18-65 years. Here, the long-term follow-up and data on second primary malignancies (SPM) are presented. After a median follow-up of 96 months, progression-free survival (censored at allogeneic transplantation, PFS) remained significantly prolonged in the PAD versus VAD arm (hazard ratio (HR) = 0.76, 95% confidence interval (95% CI) of 0.65-0.89, P = 0.001). Overall survival (OS) was similar in the PAD versus VAD arm (HR = 0.89, 95% CI: 0.74-1.08, P = 0.24). The incidence of SPM were similar between the two arms (7% each, P = 0.73). The negative prognostic effects of the cytogenetic aberration deletion 17p13 (clone size >= 10%) and renal impairment at baseline (serum creatinine > 2 mg dl(-1)) on PFS and OS remained abrogated in the PAD but not VAD arm. OS from first relapse/progression was similar between the study arms (HR = 1.02, P = 0.85). In conclusion, the survival benefit with BTZ induction/maintenance compared with classical cytotoxic agents and thalidomide maintenance is maintained without an increased risk of SPM.
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