Human Leukocyte Antigen–Haploidentical Transplantation for Relapsed/Refractory Hodgkin Lymphoma: A Multicenter Analysis

Reduced-intensity-conditioned allogeneic stem cell transplantation (SCT) remains a potentially curative approach for patients with relapsed/refractory Hodgkin lymphoma (HL) after an autologous stem cell transplantation. In the absence of an HLA-identical donor, haploidentical SCT (haplo-SCT) with post-transplantation cyclophosphamide (PT-Cy) has been evaluated with favorable preliminary results. We evaluated 24 patients who underwent haplo-SCT for relapsed/refractory HL. The conditioning regimen consisted of cyclophosphamide, fludarabine, and total body irradiation. Graft-versus-host disease (GVHD) prophylaxis consisted of a calcineurin inhibitor, mycophenolate mofetil, and PT-Cy (50 mg/kg/day for 2 days) for all patients. After a median follow-up of 2 years, the cumulative incidence (CI) of nonrelapse mortality was 26% and the CI of grades II to IV acute GVHD and chronic GVHD were 17% and 24%, respectively. Estimation of progression-free and overall survival at 2 years were 54% and 66%%, respectively. Haplo-SCT is a valuable option for relapsed/refractory HL patients after a failed autologous SCT, with favorable survival and relatively low risk of GVHD.