Novel agents and strategies in transplant-eligible patients with relapsed and refractory Hodgkin lymphoma.

The majority of patients with Hodgkin lymphoma are cured with frontline therapy; however, 10% to 15% with early-stage disease and 20% to 30% with advanced stage require second-line therapy that includes a potentially curative transplant, of which an additional 50% to 55% are cured. Those with multiply relapsed disease traditionally would receive novel agents on a clinical trial or combination chemotherapy as a potential bridge to an allogeneic stem cell transplant. This treatment paradigm has changed with the availability of brentuximab vedotin, an antibody drug conjugate used pre- and post-ASCT, as well as for palliation. With the availability of the checkpoint inhibitors, nivolumab and pembrolizumab, there will be another shift in treatment, with these agents being used for palliation and potentially replacing allogeneic stem cell transplantation in certain patient populations. Finally, up-front management is also changing and this will have an impact on how patients in the relapsed and refractory setting will be treated.