Rituximab-PECC induction followed by Y-90-ibritumomab tiuxetan consolidation in relapsed or refractory DLBCL patients who are ineligible for or have failed ASCT: results from a phase II HOVON study

Dutch HOVON Grp

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    Abstract

    Patients with relapsed/refractory diffuse large B-cell lymphoma (DLBCL) after, or ineligible for, autologous stem cell transplantation (ASCT) have a dismal prognosis. This phase II study evaluated treatment with R-PECC (rituximab, prednisolone, etoposide, chlorambucil, lomustine), every 28 days for 4 cycles in 62 patients, followed by radio-immunotherapy consolidation with Y-90-ibritumomab tiuxetan in responsive patients. Primary endpoints were failure-free survival (FFS) and incidence of grade >= 3 adverse events from start of Y-90-ibritumomab tiuxetan. The overall response rate after R-PECC was 50%. Twenty-nine of 31 responsive patients proceeded to Y-90-ibritumomab tiuxetan. Five out of 15 partial remission patients converted to complete remission after Y-90-ibritumomab tiuxetan. One-year FFS and overall survival (OS) from start of Y-90-ibritumomab tiuxetan was 52% (95% confidence interval [CI], 33-68%) and 62% (95% CI, 42-77%), respectively. One-year FFS and OS from start of R-PECC was 28% (95% CI, 17-39%) and 49% (95% CI, 36-61%), respectively. Toxicities of R-PECC and Y-90-ibritumomab tiuxetan were mainly haematological. In conclusion, for relapsed DLBCL patients the largely oral R-PECC regimen achieves promising response rates, combined with an acceptable safety profile. Consolidation with Y-90-ibritumomab tiuxetan resulted in long-term response durations in approximately one third of the patients that received it.

    Original languageEnglish
    Number of pages9
    JournalBritish Journal of Haematology
    DOIs
    Publication statusE-pub ahead of print - 10-Jul-2019

    Keywords

    • diffuse large B-cell lymphoma
    • relapse
    • Y-90-ibritumomab tiuxetan
    • consolidation
    • PECC
    • B-CELL LYMPHOMA
    • IBRITUMOMAB TIUXETAN
    • ELDERLY-PATIENTS
    • PLUS RITUXIMAB
    • OPEN-LABEL
    • TRIAL
    • CHOP
    • CHEMOTHERAPY
    • MULTICENTER
    • COMBINATION

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