PMID- 31496425 OWN - NLM STAT- MEDLINE DCOM- 20200130 LR - 20200130 IS - 1607-8454 (Electronic) IS - 1024-5332 (Linking) VI - 24 IP - 1 DP - 2019 Dec TI - Yttrium-90 ibritumomab tiuxetan consolidation versus rituximab maintenance therapy after induction chemotherapy in patients with indolent non-Hodgkin lymphoma: a single-institution experience. PG - 623-630 LID - 10.1080/16078454.2019.1664094 [doi] AB - OBJECTIVES: Indolent B-cell non-Hodgkin lymphomas (iNHLs) are considered incurable. Rituximab maintenance and yttrium-90 ibritumomab tiuxetan ((90)Y-IT) consolidation are promising post-remission therapies. However, only one randomized phase II trial has compared their efficacies and adverse effects. Here, we compared the efficacy and safety of (90)Y-IT consolidation and rituximab maintenance in iNHL patients. METHODS: We retrospectively examined 75 iNHL patients with complete or partial response after initial chemotherapy between January 2008 and December 2018. Twenty-seven patients received (90)Y-IT consolidation and 48 received rituximab maintenance (every 2 months for 2 years). Progression-free survival (PFS), overall survival (OS), and time to next treatment (TTNT) were estimated from the start of the treatment, and adverse effects were evaluated. RESULTS: After a median 3.6-year follow-up, the 5-year PFSs of the (90)Y-IT consolidation and rituximab maintenance groups were 75.5% and 82.4%, respectively (log-rank test, p = 0.839), and the 5-year OSs were 100% and 97.8%, respectively (log-rank test, p = 0.465). The corresponding median TTNTs were not reached (log-rank test, p = 0.804). The commonest adverse effect with (90)Y-IT consolidation was hematotoxicity; lower rates and grades of cytopenia were observed in patients who received rituximab maintenance. Secondary malignancies were observed in 1 patient (4%) who received (90)Y-IT consolidation and 2 patients (4.2%) who received rituximab maintenance (Fisher's exact test, p > 0.99). CONCLUSION: (90)Y-IT consolidation and rituximab maintenance were similar with respect to PFS, OS, and TTNT. However, the features and grades of adverse effects significantly differed. Patient-specific characteristics should be considered when deciding post-remission treatments. FAU - Iino, Masaki AU - Iino M AUID- ORCID: 0000-0002-3471-0890 AD - Department of Hematology and Hematopoietic Stem Cell Transplantation, Yamanashi Prefectural Central Hospital , Kofu, Yamanashi , Japan. FAU - Sakamoto, Yuma AU - Sakamoto Y AD - Department of Hematology and Hematopoietic Stem Cell Transplantation, Yamanashi Prefectural Central Hospital , Kofu, Yamanashi , Japan. FAU - Sato, Tomoya AU - Sato T AD - Department of Hematology and Hematopoietic Stem Cell Transplantation, Yamanashi Prefectural Central Hospital , Kofu, Yamanashi , Japan. LA - eng PT - Journal Article PL - England TA - Hematology JT - Hematology (Amsterdam, Netherlands) JID - 9708388 RN - 0 (Antibodies, Monoclonal) RN - 0 (Yttrium Radioisotopes) RN - 1K8M7UR6O1 (Yttrium-90) RN - 4F4X42SYQ6 (Rituximab) RN - 4Q52C550XK (ibritumomab tiuxetan) SB - IM MH - Aged MH - Aged, 80 and over MH - Antibodies, Monoclonal/pharmacology/*therapeutic use MH - Antineoplastic Combined Chemotherapy Protocols/pharmacology/*therapeutic use MH - Female MH - Humans MH - Induction Chemotherapy/*methods MH - Lymphoma, Non-Hodgkin/*drug therapy/mortality/pathology MH - Male MH - Middle Aged MH - Progression-Free Survival MH - Retrospective Studies MH - Rituximab/pharmacology/*therapeutic use MH - Treatment Outcome MH - Yttrium Radioisotopes/pharmacology/*therapeutic use OTO - NOTNLM OT - Post-remission therapy OT - adverse event OT - consolidation therapy OT - conversion rate OT - indolent non-Hodgkin lymphoma OT - radioimmunotherapy OT - rituximab maintenance therapy OT - yttrium-90 ibritumomab tiuxetan EDAT- 2019/09/10 06:00 MHDA- 2020/01/31 06:00 CRDT- 2019/09/10 06:00 PHST- 2019/09/10 06:00 [entrez] PHST- 2019/09/10 06:00 [pubmed] PHST- 2020/01/31 06:00 [medline] AID - 10.1080/16078454.2019.1664094 [doi] PST - ppublish SO - Hematology. 2019 Dec;24(1):623-630. doi: 10.1080/16078454.2019.1664094.