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Allogeneic hematopoietic stem cell transplantation following treatment with brentuximab vedotin for refractory Hodgkin lymphoma.

Brentuximab vedotin (BV) is a novel agent used for the treatment of relapsed or refractory Hodgkin lymphoma. We have described two patients with refractory Hodgkin lymphoma, who were successfully treated with BV followed by allogeneic hematopoietic stem cell transplantation (HSCT). Although both patients were resistant to conventional chemotherapies, they responded to four or five doses of BV given every 3 weeks. Then, the patients underwent bone marrow transplantation from unrelated donors after reduced-intensity conditioning consisting of fludarabine and melphalan. They remained progression-free for more than 3 years after the transplantation. These findings suggest that BV could be a promising bridging therapy to curative allogeneic HSCT for relapsed or refractory Hodgkin lymphoma. Further accumulation of such cases is warranted to evaluate the efficacy and safety of BV therapy prior to allogeneic HSCT.