Eric J Chow1, Barbara L Asselin2, Cindy L Schwartz2, David R Doody2, Wendy M Leisenring2, Sanjeev Aggarwal2, K Scott Baker2, Smita Bhatia2, Louis S Constine2, David R Freyer2, Steven E Lipshultz2, Saro H Armenian2. 1. Eric J. Chow, David R. Doody, Wendy M. Leisenring, and K. Scott Baker, Fred Hutchinson Cancer Research Center, Seattle Children's Hospital, University of Washington, Seattle, WA; Barbara L. Asselin and Louis S. Constine, University of Rochester Medical Center and School of Medicine, Rochester, NY; Cindy L. Schwartz, University of Texas MD Anderson Cancer Center, Houston, TX; Sanjeev Aggarwal and Steven E. Lipshultz, Children's Hospital of Michigan, Wayne State University, Detroit, MI; Smita Bhatia, University of Alabama, Birmingham, AL; David R. Freyer, Children's Hospital Los Angeles, University of Southern California, Los Angeles; and Saro H. Armenian, City of Hope Cancer Center, Duarte, CA. ericchow@u.washington.edu. 2. Eric J. Chow, David R. Doody, Wendy M. Leisenring, and K. Scott Baker, Fred Hutchinson Cancer Research Center, Seattle Children's Hospital, University of Washington, Seattle, WA; Barbara L. Asselin and Louis S. Constine, University of Rochester Medical Center and School of Medicine, Rochester, NY; Cindy L. Schwartz, University of Texas MD Anderson Cancer Center, Houston, TX; Sanjeev Aggarwal and Steven E. Lipshultz, Children's Hospital of Michigan, Wayne State University, Detroit, MI; Smita Bhatia, University of Alabama, Birmingham, AL; David R. Freyer, Children's Hospital Los Angeles, University of Southern California, Los Angeles; and Saro H. Armenian, City of Hope Cancer Center, Duarte, CA.
Abstract
PURPOSE: Given concerns that dexrazoxane may reduce treatment efficacy, induce second cancers, and thus compromise overall survival among children, we examined long-term overall and cause-specific mortality and disease relapse rates from three randomized clinical trials. PATIENTS AND METHODS: Children's Oncology Group trials P9404 (T-cell acute lymphoblastic leukemia/lymphoma; n = 537), P9425 (intermediate/high-risk Hodgkin lymphoma; n = 216), and P9426 (low-risk Hodgkin lymphoma; n = 255) were conducted between 1996 and 2001. Each trial randomly assigned patients to doxorubicin with or without dexrazoxane. The dexrazoxane:doxorubicin dose ratio was 10:1, and the cumulative protocol-specified doxorubicin dose was 100 to 360 mg/m(2). Dexrazoxane was given as an intravenous bolus before each doxorubicin dose. Data from all three trials were linked with the National Death Index to determine overall and cause-specific mortality by dexrazoxane status. RESULTS: Among 1,008 patients (507 received dexrazoxane) with a median follow-up of 12.6 years (range, 0 to 15.5 years), 132 died (67 received dexrazoxane). Overall mortality did not vary by dexrazoxane status (12.8% with dexrazoxane at 10 years v 12.2% without; hazard ratio [HR], 1.03; 95% CI, 0.73 to 1.45). Findings were similar when each trial was examined separately. Dexrazoxane also was not significantly associated with differential causes of death. The original cancer caused 76.5% of all deaths (HR, 0.90; 95% CI, 0.61 to 1.32) followed by second cancers (13.6% of deaths; HR, 1.24; 95% CI, 0.49 to 3.15). Specifically, dexrazoxane was not associated with deaths from acute myeloid leukemia/myelodysplasia or cardiovascular events. CONCLUSION: Among pediatric patients with leukemia or lymphoma, after extended follow-up, dexrazoxane use did not seem to compromise long-term survival.
RCT Entities:
PURPOSE: Given concerns that dexrazoxane may reduce treatment efficacy, induce second cancers, and thus compromise overall survival among children, we examined long-term overall and cause-specific mortality and disease relapse rates from three randomized clinical trials. PATIENTS AND METHODS: Children's Oncology Group trials P9404 (T-cell acute lymphoblastic leukemia/lymphoma; n = 537), P9425 (intermediate/high-risk Hodgkin lymphoma; n = 216), and P9426 (low-risk Hodgkin lymphoma; n = 255) were conducted between 1996 and 2001. Each trial randomly assigned patients to doxorubicin with or without dexrazoxane. The dexrazoxane:doxorubicin dose ratio was 10:1, and the cumulative protocol-specified doxorubicin dose was 100 to 360 mg/m(2). Dexrazoxane was given as an intravenous bolus before each doxorubicin dose. Data from all three trials were linked with the National Death Index to determine overall and cause-specific mortality by dexrazoxane status. RESULTS: Among 1,008 patients (507 received dexrazoxane) with a median follow-up of 12.6 years (range, 0 to 15.5 years), 132 died (67 received dexrazoxane). Overall mortality did not vary by dexrazoxane status (12.8% with dexrazoxane at 10 years v 12.2% without; hazard ratio [HR], 1.03; 95% CI, 0.73 to 1.45). Findings were similar when each trial was examined separately. Dexrazoxane also was not significantly associated with differential causes of death. The original cancer caused 76.5% of all deaths (HR, 0.90; 95% CI, 0.61 to 1.32) followed by second cancers (13.6% of deaths; HR, 1.24; 95% CI, 0.49 to 3.15). Specifically, dexrazoxane was not associated with deaths from acute myeloid leukemia/myelodysplasia or cardiovascular events. CONCLUSION: Among pediatric patients with leukemia or lymphoma, after extended follow-up, dexrazoxane use did not seem to compromise long-term survival.
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