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Originally published as JCO Early Release 10.1200/JCO.2008.18.8573 on March 9 2009 © 2009 American Society of Clinical Oncology.
Consolidation Therapy With Low-Dose Thalidomide and Prednisolone Prolongs the Survival of Multiple Myeloma Patients Undergoing a Single Autologous Stem-Cell Transplantation ProcedureFrom the Alfred Hospital, Victoria; Peter MacCallum Cancer Institute; Royal Melbourne Hospital, Melbourne; The Canberra Hospital, Canberra; Westmead Hospital, Sydney; Royal North Shore, Sydney; Princess Alexandra Hospital, Brisbane; and the Royal Adelaide Hospital, Adelaide, Australia. Corresponding author: Andrew Spencer, FRACP, FRCPA, DM, Malignant Haematology and Stem Cell Transplantation Service, Alfred Hospital, Commercial Rd, Melbourne, Victoria 3004, Australia; e-mail: aspencer{at}netspace.net.au. Purpose Thalidomide is effective in the treatment of newly diagnosed and relapsed/refractory multiple myeloma (MM). However, the role of thalidomide in the post-autologous stem cell transplantation (ASCT) context remains unclear. This study assessed whether the addition of thalidomide consolidation following ASCT would improve the durability of responses achieved and overall survival. Patients and Methods Between January 2002 and March 2005, 269 patients with newly diagnosed MM who achieved disease stabilization or better with conventional induction chemotherapy received a single high-dose melphalan conditioned ASCT. Post-ASCT, 129 patients were randomly assigned to receive indefinite prednisolone maintenance therapy (control group) and 114 to receive the same in addition to 12 months of thalidomide consolidation (thalidomide group). The primary study end points were progression-free survival (PFS) and overall survival (OS). The secondary end point was tolerability. Results After a median follow-up of 3 years, the postrandomization 3-year PFS rates were 42% and 23% (P < .001; hazard ratio [HR], 0.5; 95% CI, 0.35 to 0.71) and the OS rates were 86% and 75% (P = .004; HR, 0.41; 95% CI, 0.22 to 0.76) in the thalidomide and control groups, respectively. There was no difference in survival between groups 12 months after disease progression (79% v 77%; P = .237). Neurological toxicities were more common in the thalidomide arm but there were no differences between arms for thromboembolic events. Conclusion Consolidation therapy with 12 months of thalidomide combined with prednisolone prolongs survival when used after a single high-dose therapy supported ASCT in patients with newly diagnosed MM. Furthermore, thalidomide consolidation therapy did not adversely impact on survival in the subsequent salvage setting. Supported by grants from Pharmion Corporation, Novartis Pharmaceuticals, Amgen Inc, and the Myeloma Research Group, Alfred Hospital. Presented in part at the 48th Annual Meeting of the American Society of Hematology, Orlando, FL, December 9-12, 2006; and at the XIth International Myeloma Workshop, Kos Island, Greece, June 25-30, 2007. Authors' disclosures of potential conflicts of interest and author contributions are found at the end of this article. Clinical Trials repository link available on JCO.org.
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Copyright © 2009 by the American Society of Clinical Oncology, Online ISSN: 1527-7755. Print ISSN: 0732-183X
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