Effect of short-duration chemoimmunotherapy plus radioimmunotherapy on response rates in relapsed follicular lymphoma: A U.K. NCRI Lymphoma Group Study, CR UK/07/038.

8056 Background: Radioimmunotherapy (RIT) and rituximab (R) maintenance have been investigated after chemotherapy (CT) or R-CT in first line treatment of follicular lymphoma (FL), but less is known about the efficacy of RIT after R-CT in relapsed FL. This phase II study was conducted to examine efficacy and safety of abbreviated R-CT followed by 90Y Ibritumomab tiuxetan in patients with recurrent FL. Methods: Patients (pts) had FL, at 1st or 2nd relapse after response to R-CT or CT alone. All had WHO/ECOG performance status ≤2, and adequate bone marrow (BM), kidney, liver and cardiac function. BM involvement by lymphoma had to be <25% prior to infusion of 90Y Ibritumomab tiuxetan, but could be higher at study entry. Pts received 3 cycles of either R-CHOP or R-CVP, followed by 90Y Ibritumomab tiuxetan (15MBq/Kg, maximum 1200 MBq). No maintenance R was given. Results: 52 pts were enrolled from 6/2008 to 7/2010. Median age was 62 years (range 31-87). 46% had high FLIPI score at entry, 31% intermediate. 80% w...