Successful engraftment following reduced-intensity cord blood transplantation with fludarabine and oral busulfan for advanced hematologic diseases

7110 Background: Feasibility of reduced-intensity cord blood transplantation (RI-CBT) has been demonstrated in adult patients. Most researchers use preparative regimens containing total body irradiation (TBI) 2–4 Gy, while TBI causes considerable toxicities in elderly patients. We investigated the feasibility of RI-CBT using non-TBI regimen for the treatment of adult hematologic diseases. Methods: Nineteen patients (median age, 61, range, 38–74) with advanced hematological diseases were enrolled in this study. Fifteen patients had chemorefractory diseases at RI-CBT. Preparative regimen comprised fludarabine 180 mg/m2 and oral busulfan 8 mg/kg. Graft-versus-host disease (GVHD) prophylaxis was tacrolimus. Engraftment was defined as an absolute neutrophil count > 0.5 × 10E9/l. Primary graft failure was defined as the complete loss of donor-type hematopoiesis occurring without engraftment. Secondary graft failure was defined as the loss of donor-type hematopoiesis occurring after primary engraftment. Endpoint...