Complete Remission Following Chemotherapy with Low-dose Cytosine Arabinoside and Macrophage Colony-stimulating Factor/Granulocyte Colony-stimulating Factor in a Patient with Relapsed Acute Myeloid Leukemia after Stem Cell Transplantation

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The prognosis of patients who relapse with acute myeloid leukemia (AML) after undergoing stem cell transplantation (SCT) is poor. There exist some treatments for relapsed AML; however, almost all treatments are associated with a high level of regimen-related toxicities (RRTs). The RRT of donor lymphocyte infusion is lower than that of other treatments; however, the efficacy of this treatment in treating patients with relapsed AML is lower than that observed in patients with chronic myelomonocytic leukemia. We herein report a case of relapsed AML after SCT in a 65-year-old man. We performed donor lymphocyte infusion; however, it was not effective. We then administered chemotherapy with cytosine arabinoside and macrophage colony-stimulating factor/granulocyte colony-stimulating factor and complete remission was achieved. Since graft-versus-host disease occurred after the administration of low-dose chemotherapy in this case, we speculated that the chemotherapy induced a graft-versus-leukemia effect.