Thirty-three patients with acute leukemia (15 with lymphoblastic leukemia and 18 with myeloblastic leukemia) were entered into a program of high-dose radiochemotherapy followed by allogeneic bone-marrow transplantation. These patients were in various clinical stages of disease. Of 10 in complete hematologic remission at the time of transplantation, seven were alive without maintenance therapy at the time of evaluation, eight to 35 months after grafting; one was in relapse. Of 11 who received transplants during partial remission, six were in remission without further treatment eight to 33 months after transplantation. In 12 the disease was refractory to chemotherapy when preparation for transplantation was started, and only one of them was alive and free of disease after 10 months. Recurrent leukemia, graft-versus-host disease, viral pneumonia, and early therapy-related toxicity were the major causes of failure. High-dose chemotherapy and total-body irradiation followed by allogeneic marrow transplantation performed during complete or partial remission can produce long-term remission of acute leukemia.
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