Late relapses following high-dose autologous stem cell transplantation (HD-ASCT) for Hodgkin's lymphoma (HL) in the ABVD therapeutic era

Abstract

Salvage chemotherapy followed by high-dose autologous stem cell transplantation (HD-ASCT) is the standard of care for patients who have relapsed or refractory Hodgkin's lymphoma (HL). Few trials have had long-term follow-up post-HD-ASCT in the ABVD (adriamycin, bleomycin, vinblastine, and dacarbazine) era of treatment. We reviewed 95 consecutive patients who received HD-ASCT for relapsed or refractory HL following ABVD failure between 1990 and 2006 at the University of Rochester. Median follow-up for survivors was 8.2 years. All patients received HD-ASCT following upfront ABVD (or equivalent) failure. At 5 years, overall survival (OS) and event-free survival (EFS) were 54% and 37%, respectively. In total, 54 patients have died; 37 of these patients died directly of HL. Notably, there were 19 deaths >3 years post-HD-ASCT and 13 of these late deaths are directly attributable to HL. Furthermore, there were 51 documented relapses, 9 of which occurred >3 years post-HD-ASCT. In contrast to other studies, we did not observe a plateau in EFS following transplantation. Patients appear to be at continuous risk of recurrence beyond 3 years after HD-ASCT. Our results emphasize the importance of long-term follow-up for both toxicity and recurrence, and have important implications in defining success of posttransplantation maintenance strategies.