Summary:
Epstein-Barr virus (EBV) is closely associated with the progressive and often fatal lymphoproliferative disorders (LPD) inBone marrow transplantation provides a life-saving therapy for a variety of hematologic and non-hematologic diseases. 1 In bone marrow transplant recipients, manipulation of the marrow graft, infection, graft-versus-host disease (GVHD), and/or usage of immunosuppressive agents all contribute to delay in immune reconstitution. The incidence of EBV-LPD has been reported to be between 5 and 39% in solid organ transplant recipients. 2-4 EBV-LPD following autologous BMT is rare, 5,6 and the incidence of EBV-LPD in HLA-identical sibling bone marrow transplants is generally less than 1%. 7 Recently, several reports 8-12 have identified risk factors in allogeneic transplants, which are associated with an increased incidence of EBV-LPD. These risk factors include HLA disparity, depletion of the donor marrow graft with T cell-specific monoclonal antibodies (MAb), use of antithymocyte globulin in vivo, and severe GVHD.Increasing numbers of BMT are being performed using alternative donors and manipulated grafts. There has not been much reported focus on the incidence of EBV-LPD on these high-risk patients group. We retrospectively examined EBV-LPD in a series of 318 patients who underwent partially mismatched related donor bone marrow transplants at the Division of Transplantation Medicine in the University of South Carolina. This study represents the largest series describing the incidence of EBV-LPD following PMRD bone marrow transplants with T cell-depleted grafts from a single institution. This descriptive report is focused on EBV-LPD clinical characteristics, relationship