Outcomes of Older Adults with Non-Hodgkin Lymphoma Undergoing Autologous Stem Cell Transplantation: A Mayo Clinic Cohort Analysis

Abstract

Autologous stem cell transplantation (ASCT) is an important treatment that can offer a cure for patients with lymphoma. However, advanced age is an important factor that determines eligibility and outcomes after ASCT. Over the past decade, attributed to improved supportive care, ASCT for older patients has become more feasible. In this study, we report the single-center outcomes of older patients with lymphoma undergoing ASCT at Mayo Clinic Rochester to highlight its interval improvement over time and to help redefine the implications of ASCT in the chimeric antigen receptor T cell therapy era. This single-center retrospective study evaluated the characteristics and outcomes of older patients with lymphoma who underwent ASCT between 2000 and 2021. We report various relevant transplantation-related outcomes, including progression-free survival, overall survival (OS), relapse incidence, and nonrelapse mortality (NRM) in older patients with various lymphoma histologic subtypes. The main outcome was NRM, defined as the time from ASCT to non-lymphoma-related death, with relapse as a competing event. Of 492 patients age ≥65 years were analyzed. The median age at ASCT was 68.8 years. The most common indication for ASCT was diffuse large B cell lymphoma, accounting for 59.3% of cases. In multivariate analyses, patients undergoing ASCT in 2009 to 2021, an Eastern Cooperative Oncology Group Performance Status of 0, and low Hematopoietic Cell Transplantation Comorbidity Index (HCT-CI) (0 to 3) had a significantly lower NRM. Factors associated with OS included age, lactate dehydrogenase level, and HCT-CI. The 1-year NRM in older patients was low at 6.0%, in concordance with previous reports. Age should not be the sole factor determining a patient's ASCT eligibility. With the proper patient selection, ASCT remains a reasonable option for older patients with lymphoma.