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Blood, 15 May 2004, Vol. 103, No. 10, pp. 3655-3661. Prepublished online as a Blood First Edition Paper on January 29, 2004; DOI 10.1182/blood-2003-08-2705.
CLINICAL OBSERVATIONS, INTERVENTIONS, AND THERAPEUTIC TRIALS Allogeneic bone marrow transplantation for children with acute myelocytic leukemia in first remission demonstrates a role for graft versus leukemia in the maintenance of disease-free survivalFrom the American Family Life Assurance Company (AFLAC) Cancer Center, Emory University/Children's Healthcare, Atlanta, GA; Department of Pediatric Hematology-Oncology, Izaak W. Killam Hospital for Children, Halifax, Nova Scotia, Canada; Department of Preventative Medicine, University of Southern California Keck School of Medicine, Los Angeles; Department of Hematology/Oncology, Roger Maris Cancer Center, Fargo, ND; National Cancer Institute, Bethesda, MD; Fred Hutchinson Cancer Research Center, Seattle, WA; Department of Hematology-Oncology, Children's Hospital of Orange County, Orange, CA; Department of Pediatric Hematology-Oncology, University of North Carolina, Chapel Hill; and Division of Oncology, Children's Hospital of Philadelphia, Philadelphia, PA.
In Children's Cancer Group (CCG) study 2891, patients who were recently diagnosed with acute myelocytic leukemia (AML) were assigned randomly to standard- or intensive-timing induction chemotherapy. Patients in first complete remission (CR1) and who had a human leukocyte antigen (HLA)identical, related donor or a donor disparate at a single class I or II locus were nonrandomly assigned to receive a bone marrow transplant (BMT) by using oral busulfan (16 mg/kg) and cyclophosphamide (200 mg/kg). Methotrexate only was given for graft-versus-host disease (GVHD) prophylaxis. One hundred fifty patients received transplants. Grade 3 or 4 acute GVHD occurred in 9% of patients. Patients younger than 10 years had a lower incidence of grade 3 or 4 GVHD (4.6%) compared with patients 10 years or older (17.4%) (P = .044). Disease-free survival (DFS) at 6 years was 67% and 42% for recipients of intensive- and standard-timing induction therapies, respectively. Multivariate analysis showed that receiving intensive-timing induction therapy (P = .027) and having no hepatomegaly at diagnosis (P = .009) was associated with favorable DFS, and grades 3 and 4 acute GVHD were associated with inferior DFS. Multivariate analysis showed that grades 1 or 2 GVHD (P = .008) and no hepatomegaly at diagnosis (P = .014) were associated with improved relapse-free survival (RFS). Our results show that children older than 10 years are at higher risk for developing severe GVHD; acute GVHD is associated with favorable RFS.
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