Donor cell derived acute myeloid leukemia after allogeneic cord blood transplantation in a patient with adult T‐cell lymphoma

We report a patient with adult T-cell lymphoma who developed acute myeloid leukemia (AML) after allogeneic cord blood transplantation (CBT). Fluorescence in situ hybridization (FISH) studies and molecular analysis using short tandem repeat (STR) sequences proved the AML to be of donor origin. Although 25 cases of donor cell leukemia (DCL) occurring after allogeneic bone marrow transplantation have previously been reported, there have been no reports of DCL after CBT. This case is the first-reported DCL patient after CBT. Am. J. Hematol. 79:294–298, 2005. © 2005 Wiley-Liss, Inc.