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Original Article
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Volume 331:1253-1258 November 10, 1994 Number 19
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Bone Marrow Transplants from HLA-Identical Siblings as Compared with Chemotherapy for Children with Acute Lymphoblastic Leukemia in a Second Remission
A. John Barrett, Mary M. Horowitz, Brad H. Pollock, Mei-Jie Zhang, Mortimer M. Bortin, George R. Buchanan, Bruce M. Camitta, Judith Ochs, John Graham-Pole, Philip A. Rowlings, Alfred A. Rimm, John P. Klein, Jonathan J. Shuster, Kathleen A. Sobocinski, and Robert Peter Gale

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ABSTRACT

Background It is unclear how best to treat children with acute lymphoblastic leukemia who are in a second remission after a bone marrow relapse. For those with HLA-identical siblings, the question of whether to perform a bone marrow transplantation or to continue chemotherapy has not been answered.

Methods We compared the results of treatment with marrow transplants from HLA-identical siblings in 376 children, as reported to the International Bone Marrow Transplant Registry, with the results of chemotherapy in 540 children treated by the Pediatric Oncology Group. A preliminary analysis identified variables associated with treatment failure in both groups. We selected cohorts by matching these variables. A possible bias associated with differences in the interval between remission and treatment was controlled for by choosing matched pairs in which the duration of the second remission in the chemotherapy recipient was at least as long as the time between the second remission and transplantation in the transplant recipient. A total of 255 matched pairs were studied.

Results The mean (±SE) probability of a relapse at five years was significantly lower among the transplant recipients than among the chemotherapy recipients (45 ±4 percent vs. 80 ±3 percent, P<0.001). At five years the probability of leukemia-free survival was higher after transplantation than after chemotherapy (40 ±3 percent vs. 17 ±3 percent, P<0.001). The relative benefit of transplantation as compared with chemotherapy was similar in children with prognostic factors indicating a high or low risk of relapse (the duration of the first remission, age, leukocyte count at the time of the diagnosis, and phenotype of the leukemic cells).

Conclusions For children with acute lymphoblastic leukemia in a second remission, bone marrow transplants from HLA-identical siblings result in fewer relapses and longer leukemia-free survival than does chemotherapy.


Source Information

From the National Heart, Lung, and Blood Institute, Bethesda, Md. (A.J.B.); the International Bone Marrow Transplant Registry, Health Policy Institute (M.M.H., M.-J.Z., M.M.B., P.A.R., K.A.S.), and the Departments of Pediatrics (B.M.C.) and Biostatistics (J.P.K.), Medical College of Wisconsin, Milwaukee; the Pediatric Oncology Group Statistical Office (B.H.P., J.J.S.) and the College of Medicine, University of Florida (J.G.-P.), Gainesville; the University of Texas Southwestern Medical Center, Dallas (G.R.B.); St. Jude's Children's Hospital, Memphis, Tenn. (J.O.); Case Western Reserve University School of Medicine, Cleveland (A.A.R.); and Salick Health Care, Los Angeles (R.P.G.). Dr. Mortimer M. Bortin is deceased.

Address reprint requests to Dr. Horowitz at the International Bone Marrow Transplant Registry, Medical College of Wisconsin, 8701 W. Watertown Plank Rd., Milwaukee, WI 53226.

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Related Letters:

Treatment of Acute Lymphoblastic Leukemia in a Second Remission
Pinkel D., Johnson F. L., Thomas E. D., Barrett A. J., Pollock B. H., Buchanan G. R.
Extract | Full Text  
N Engl J Med 1995; 332:823-824, Mar 23, 1995. Correspondence

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