Radioimmunotherapy for mantle cell lymphoma: 5-year follow-up of 90 patients from the international RIT registry

To assess the efficacy of radioimmunotherapy (RIT) with 90 yttrium-ibrutinib-tiuxetan (90Y-IT) in mantle cell lymphoma, data from 90 patients registered in the RIT Network with a median follow-up (FU) of 5.5 years after RIT were evaluated. 90Y-IT was given as first-line therapy in 45 (50%) and for r...

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Bibliographic Details
Published in:Annals of hematology 2020-05, Vol.99 (5), p.1073-1079
Main Authors: Hohloch, Karin, Windemuth-Kieselbach, Christine, Zinzani, Pier Luigi, Cacchione, Roberto, Jurczak, Wojciech, Suh, C., Trümper, Lorenz, Scholz, Christian W.
Format: Article
Language:English
Subjects:
Adult
Aged
Disease-Free Survival
Female
Follow-Up Studies
Hematology
Humans
Lymphoma
Lymphoma, Mantle-Cell - mortality
Lymphoma, Mantle-Cell - radiotherapy
Male
Medicine
Medicine & Public Health
Middle Aged
Oncology
Original
Original Article
Radioimmunotherapy
Registries
Survival Rate
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Summary:To assess the efficacy of radioimmunotherapy (RIT) with 90 yttrium-ibrutinib-tiuxetan (90Y-IT) in mantle cell lymphoma, data from 90 patients registered in the RIT Network with a median follow-up (FU) of 5.5 years after RIT were evaluated. 90Y-IT was given as first-line therapy in 45 (50%) and for relapse in 45 (50%) patients. Most patients received 90Y-IT as consolidation after chemoimmunotherapy in first line (98%) and in relapse (53%). As a first-line treatment, 30 patients (pts.) (67%) achieved CR, 10 pts. (22%) PR%. and 1 pt. (2%) PD, and for 4 pts. (9%), no response data was available. At relapse, CR was achieved in 17 pts. (38%), PR in 6 pts. (13%), SD in 2 pts. (4%), and 6 pts. (13%) had PD, while the response was not documented for 14 pts. (31%). After a median FU of 5.5 years, median PFS for all patients was 2.11 (95% CI, 1.03–2.32) years, and median OS was 4.05 (95% CI, 2.79–7.21) years. Eleven pts. (12.2%) developed second malignancy. In conclusion, this is the largest report of MCL pts. treated with 90Y-IT to date. 90Y-IT was most often used as consolidation after first- and second-line chemotherapy and may improve the results achieved using chemoimmunotherapy alone. However, the results are less encouraging compared to treatment with small molecules such as ibrutinib.
ISSN:0939-5555
1432-0584
DOI:10.1007/s00277-020-03956-0