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Graft-versus-host disease (GVHD) is a major factor contributing to mortality and morbidity after allogeneic haematopoietic stem-cell transplantation (HSCT). In the last 3 years, there has been regulatory approval of new drugs and considerable change in clinical approaches to prophylaxis and management of GVHD. To standardise treatment approaches, the European Society for Blood and Marrow Transplantation (EBMT) has updated its clinical practice recommendations. We formed a panel of one methodologist and 22 experts in the field of GVHD management. The selection was made on the basis of their role in GVHD management in Europe and their contributions to the field, such as publications, presentations at conferences, and other research. We applied the GRADE process to ten PICO (patient, intervention, comparator, and outcome) questions: evidence was searched for by the panel and graded for each crucial outcome. In two consensus meetings, we discussed the evidence and voted on the wording and strengths of recommendations. Key updates to the recommendations include: (1) primary use of ruxolitinib in steroid-refractory acute GVHD and steroid-refractory chronic GVHD as the new standard of care, (2) use of rabbit anti-T-cell (thymocyte) globulin or post-transplantation cyclophosphamide as standard GVHD prophylaxis in peripheral blood stem-cell transplantations from unrelated donors, and (3) the addition of belumosudil to the available treatment options for steroid-refractory chronic GVHD. The EBMT proposes to use these recommendations as the basis for routine management of GVHD during allogenic HSCT. The current recommendations favour European practice and do not necessarily represent global preferences., Competing Interests: Declaration of interests OP received honoraria or travel support from Gilead, Jazz, Merck, Sharp & Dohme (MSD), Novartis, Pfizer, and Therakos; received research support from Incyte and Priothera; and is a member of advisory boards to Equillium Bio, Jazz, Gilead, Novartis, MSD, Omeros, Priothera, Sanofi, Shionogi, and SOBI. FP has received travel support and was member of advisory board of GlaxoSmithKline, Amgen, Roche, and Janssen. HG received honoraria for participation in advisory boards and speakers' bureau from Celgene, Gilead, Novartis, Roche, Sanofi, Takeda, and Therakos. HS reports having received personal fees from Incyte, Janssen, Novartis, Sanofi, and from the Belgian Hematological Society (BHS); reports research grants from Novartis and the BHS; and has received non-financial support (travel grants) from Gilead, Pfizer, the European Society for Blood and Marrow transplantation and the Center for International Bone Marrow Transplantation Research. MAr is on the advisory board of Neovii and reports research support from Therakos and Roche. NK received honoraria from Kite–Gilead, Jazz, MSD, Neovii Biotech, Novartis, Riemser, Pfizer, BMS; and research support from Neovii, Riemser, Novartis and Deutsche Knochenmarksperderdatei. AS has received honoraria from Takeda, Bristol-Myers Squibb–Celgene, MSD, Janssen, Amgen, Novartis, Kite–Gilead, Sanofi, Roche, and Alexion; is a consultant to Takeda, Bristol-Myers Squibb–Celgene, Novartis, Janssen, Gilead, Sanofi; and has received research support from Takeda. FB participated in advisory board meetings and received speaker fees from NEOVII, Sanofi, Takeda, and Novartis. SG received honoraria or travel support from Novartis and Janssen, and is member of advisory boards to Novartis and Janssen. ZP received honoraria from Sanofi and Therakos. DW received a research grant from Novartis, and received honoraria from Novartis, Takeda, Mallinckrodt, Sanofi, Incyte, Behring, and NEOVII., (Copyright © 2024 Elsevier Ltd. All rights reserved.)

Background: Many older patients with acute myeloid leukaemia die or cannot undergo allogeneic haematopoietic stem-cell transplantation (HSCT) due to toxicity caused by intensive chemotherapy. We hypothesised that replacing intensive chemotherapy with decitabine monotherapy could improve outcomes., Methods: This open-label, randomised, controlled, phase 3 trial was conducted at 54 hospitals in nine European countries. Patients aged 60 years and older who were newly diagnosed with acute myeloid leukaemia and had not yet been treated were enrolled if they had an Eastern Cooperative Oncology Group performance status of 2 or less and were eligible for intensive chemotherapy. Patients were randomly assigned (1:1) to receive decitabine or standard chemotherapy (known as 3 + 7). For the decitabine group, decitabine (20 mg/m 2 ) was administered for the first 10 days in the first 28-day cycle, followed by 28-day cycles consisting of 5 days or 10 days of decitabine. For the 3 + 7 group, daunorubicin (60 mg/m 2 ) was administered over the first 3 days and cytarabine (200 mg/m 2 ) over the first 7 days, followed by 1-3 additional chemotherapy cycles. Allogeneic HSCT was strongly encouraged. Overall survival in the intention-to-treat population was the primary endpoint. Safety was assessed in all patients who received the allocated treatment. This trial is registered at ClinicalTrials.gov, NCT02172872, and is closed to new participants., Findings: Between Dec 1, 2014, and Aug 20, 2019, 606 patients were randomly assigned to the decitabine (n=303) or 3 + 7 (n=303) group. Following an interim analysis which showed futility, the IDMC recommended on May 22, 2019, that the study continued as planned considering the risks and benefits for the patients participating in the study. The cutoff date for the final analysis presented here was June 30, 2021. At a median follow-up of 4·0 years (IQR 2·9-4·8), 4-year overall survival was 26% (95% CI 21-32) in the decitabine group versus 30% (24-35) in the 3 + 7 group (hazard ratio for death 1·04 [95% CI 0·86-1·26]; p=0·68). Rates of on-protocol allogeneic HSCT were similar between groups (122 [40%] of 303 patients for decitabine and 118 [39%] of 303 patients for 3+7). Rates of grade 3-5 adverse events were 254 (84%) of 302 patients in the decitabine group and 279 (94%) of 298 patients in the 3 + 7 group. The rates of grade 3-5 infections (41% [125 of 302] vs 53% [158 of 298]), oral mucositis (2% [seven of 302] vs 10% [31 of 298]) and diarrhoea (1% [three of 302] vs 8% [24 of 298]) were lower in the decitabine group than in the 3 + 7 group. Treatment-related deaths were reported for 12% (35 of 302) of patients in the decitabine group and 14% (41 of 298) in the 3 + 7 group., Interpretation: 10-day decitabine did not improve overall survival but showed a better safety profile compared with 3 + 7 chemotherapy in older patients with acute myeloid leukaemia eligible for intensive chemotherapy. Decitabine could be considered a better-tolerated and sufficiently efficacious alternative to 3 + 7 induction in fit older patients with acute myeloid leukaemia without favourable genetics., Funding: Janssen Pharmaceuticals., Competing Interests: Declaration of interests MLü received research support to his institution from Janssen and European Organisation for Research and Treatment of Cancer (EORTC); is on the advisory boards for AbbVie, Astex, Janssen-Cilag, Otsuka, and Syros; and is currently working in an ongoing trial with a study drug provided by Cheplapharm. MK received research funding from Merck, Bristol Myers Squibb (BMS), Pierre Fabre, Janssen, and Immunocore. SF received personal funding by BMS and Celgene. AG received a grant for study conduct, and drug supply for Dacogen from Janssen Pharma Educational. JHJ received support for molecular analysis from Janssen and EORTC. FE received personal funding from AbbVie, Incyte, Janssen, Novartis, and Syros. RW received consulting fees from Amgen, BMS, Celgene, Janssen, Kite, Gilead, Novartis, Pfizer, and Sanofi; payment from AbbVie, Amgen, BMS, Celgene, Janssen, Kite, Gilead, Pfizer, and Sanofi; and support for attending meetings or travel from Janssen. HB is secretary of EORTC Leukemia Group; received research funding by the German Jose Carreras Leukemia Foundation and German Research Foundation; and honoraria from AbbVie, BMS, Celgene, Merck, Novartis, and Servier. UD received personal honoraria for participation in a data safety monitoring board from Avencell Europe and data safety monitoring board for an acute myeloid leukaemia CAR-T cell trial from Avencell Europe. FB received payments to his institution from Incyte Biosciences, Takeda, ExCellThera, and MaaT Pharma. SS received funding to his institution from Janssen Pharmaceuticals. All other authors declare no competing interests., (Copyright © 2023 Elsevier Ltd. All rights reserved.)

Graft-versus-host disease (GVHD) is a major factor contributing to mortality and morbidity after allogeneic stem-cell transplantation. Because of the small number of results from well designed, large-scale, clinical studies there is considerable variability in the prevention and treatment of GVHD worldwide. In 2014, to standardise treatment approaches the European Society of Blood and Marrow Transplantation published recommendations on the management of GVHD in the setting of HLA-identical sibling or unrelated donor transplantation in adult patients with haematological malignancies. Here we update these recommendations including the results of study published after 2014. Evidence was searched in three steps: first, a widespread scan of published trials, meta-analyses, and systematic reviews; second, expert opinion was added for specific issues following several rounds of debate; and third, a refined search to target debated or rapidly updating issues. On the basis of this evidence and the 2014 recommendations, five members of the EBMT Transplant Complications Working Party created 38 statements on GVHD prophylaxis, drug management, and treatment of acute and chronic GVHD. Subsequently, they created the EBMT GVHD management recommendation expert panel by recruiting 20 experts with expertise in GVHD management. An email-based, two-round Delphi panel approach was used to manage the consensus. Modified National Comprehensive Cancer Network categories for evidence and consensus were applied to the approved statements. We reached 100% consensus for 29 recommendations and 95% consensus for nine recommendations. Key updates to these recommendations include a broader use of rabbit anti-T-cell globulin; lower steroid doses for the management of grade 2 acute GVHD with isolated skin or upper gastrointestinal tract manifestations; fluticasone, azithromycin, and montelukast should be used for bronchiolitis obliterans syndrome; and the addition of newer treatment options for resteroid-refractory acute and chronic GVHD. In addition, we discuss specific aspects of GVHD prophylaxis and management in the setting of haploidentical transplantation and in paediatric patients, but no formal recommendations on those procedures have been provided in this Review. The European Society of Blood and Marrow Transplantation proposes to use these recommendations as a basis for the routine management of GVHD during stem-cell transplantation., (Copyright © 2020 Elsevier Ltd. All rights reserved.)