Optimizing resources: low-dose nivolumab combinations in the management of relapsed/refractory Hodgkin lymphoma.
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Up to one-third of patients with classical Hodgkin lymphoma (cHL) are not responsive to first-line therapy or eventually relapse. Immune checkpoint inhibitors (ICIs) have been successfully employed to treat relapsed/refractory cHL (r/r cHL) but place patients at risk of financial toxicity. Early-phase trials and observational data suggest that low doses of ICIs may achieve similar results to those obtained with high doses. In this study, we report a single-center experience using low-dose nivolumab (LD-Nivo) in different combinations for r/r cHL, including monotherapy, LD-Nivo plus brentuximab vedotin (BV), and LD-Nivo plus chemotherapy. The primary outcome was to assess the efficacy of LD-nivo in patients with r/r cHL. We included 23 consecutive patients (median age 27 years; 57% female). LD-Nivo was prescribed in 40, 100, and 140 mg fixed doses Q2W. Survival analysis was performed employing the Kaplan-Meier method. 73% of patients achieved an overall response, 43% complete response, and 30% partial response. One-year overall survival was 94.4% (95% CI, 0.84-1), and the 1-year progression-free survival was 89.4% (95% CI, 0.77-1). OS and PFS were similar accross combinations. The median dose of nivolumab was 0.78 mg/kg (range, 0.62-1.11), and the median number of cycles until a response was documented was 6 (range, 2-9). During follow-up, 18 patients received transplantation (11 autologous, 6 allogeneic). No statistically significant differences in survival or response were detected between nivolumab combinations or doses. Adverse events were observed in 61% of the patients, with none grade 3-4. LD-Nivo demonstrated promising results in relapsed/refractory HL, highlighting its potential as a cost-effective treatment option. Further research is needed to validate these findings and guide clinical practice.