Rituximab maintenance therapy of follicular lymphoma in clinical practice.

Standard of care for patients with symptomatic, advanced-stage follicular lymphoma (FL) is rituximab-containing chemoimmunotherapy followed by rituximab maintenance. This prospective, multicenter, noninterventional study analyzed how efficacy and safety data from randomized controlled trials translate into clinical practice in Germany. Both treatment-naïve and relapsed/refractory patients with FL, who responded to rituximab-containing induction and were scheduled for rituximab maintenance, were observed for 24 months. Effectiveness was measured by response and Kaplan-Meier survival analysis. In addition, treatment patterns of induction and maintenance, as well as adverse events, were documented. The evaluable study population consisted of 310 first-line patients and 173 relapsed/refractory patients, including 116 patients with initial Ann-Arbor stage I/II and 20 patients with FL grade 3B. Regarding first-line induction, a shift from R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, prednisone) to R-bendamustine was observed over time, as well as a decline in radiotherapy. 2-year progression-free survival rates were 88.3% (95% confidence interval [CI] 84.0-92.6) for first-line patients and 76.0% (95% CI: 68.8-83.3) for relapsed/refractory patients. Conversion from partial to complete remission (PR, CR) occurred in 53.4% of analyzed first-line patients with PR, resulting in 69.4% CRs at study end (relapsed/refractory: conversion in 42.9%, final CRs 57.9%). Safety results were consistent with the known safety profile of rituximab in this setting. Both treatment-naïve and relapsed/refractory patients with FL show favorable 2-year PFS rates and improvements in the remission status with postinduction rituximab monotherapy as maintenance and consolidation therapy.