High-Dose Treosulfan and Melphalan as Consolidation Therapy Versus Standard Therapy for High-Risk (Metastatic) Ewing Sarcoma

Author:

Koch Raphael1ORCID,Gelderblom Hans2ORCID,Haveman Lianne3ORCID,Brichard Benedicte4ORCID,Jürgens Heribert5,Cyprova Sona6,van den Berg Henk7,Hassenpflug Wolf8,Raciborska Anna9ORCID,Ek Torben10ORCID,Baumhoer Daniel11ORCID,Egerer Gerlinde12,Eich Hans Theodor13,Renard Marleen14,Hauser Peter1516ORCID,Burdach Stefan1718,Bovee Judith19,Bonar Fiona20ORCID,Reichardt Peter21,Kruseova Jarmila6ORCID,Hardes Jendrik22ORCID,Kühne Thomas23ORCID,Kessler Torsten24ORCID,Collaud Stephane25ORCID,Bernkopf Marie26,Butterfaß-Bahloul Trude27,Dhooge Catharina28ORCID,Bauer Sebastian2930ORCID,Kiss János31,Paulussen Michael32,Hong Angela3334,Ranft Andreas303536ORCID,Timmermann Beate303637,Rascon Jelena3839ORCID,Vieth Volker40,Kanerva Jukka41,Faldum Andreas1,Metzler Markus42ORCID,Hartmann Wolfgang43ORCID,Hjorth Lars44ORCID,Bhadri Vivek4546,Dirksen Uta303536ORCID

Affiliation:

1. Institute of Biostatistics and Clinical Research, University of Muenster, Muenster, Germany

2. Department of Medical Oncology, Leiden University Medical Center, Leiden, the Netherlands

3. Department of Solid Tumors, Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands

4. Department of Pediatric Haematology and Oncology, Cliniques Universitaires Saint Luc, Université Catholique de Louvain, Brussels, Belgium

5. Department of Pediatric Hematology and Oncology, University Children's Hospital Muenster, Muenster, Germany

6. Charles University, Motol Children's Hospital, Prague, Czech Republic

7. Department of Pediatrics/Oncology, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands

8. Pediatric Hematology and Oncology, University Hospital Eppendorf, Hamburg, Germany

9. Department of Oncology and Surgical Oncology for Children and Youth, Mother and Child Institute, Warsaw, Poland

10. Childhood Cancer Center, Queen Silvia Children's Hospital, Gothenburg, Sweden

11. Bone Tumor Reference Center at the Institute of Medical Genetics and Pathology, University Hospital Basel and University of Basel, Basel, Switzerland

12. Department of Internal Medicine V, Heidelberg University Hospital, Heidelberg, Germany

13. Department of Radiation Oncology, University Hospital Muenster, Muenster, Germany

14. Pediatric Hematology and Oncology, University Hospital Leuven Gasthuisberg, Leuven Belgium

15. Head of the Pediatric Oncology and Transplantation Unit, Velkey László Child's Health Center, Borsod-Abaúj-Zemplén County University Teaching Hospital, Miskolc, Hungary

16. 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary

17. Department of Pediatrics and Children's Cancer Research Center (CCRC), Technische Universität München, Munich, Germany

18. British Columbia Cancer Research Centre, Vancouver, BC, Canada

19. Department of Pathology, Leiden University Medical Center, Leiden, the Netherlands

20. Douglass Hanly Moir Pathology, Macquarie Park, Australia

21. Department of Oncology and Palliative Care, Helios Klinikum Berlin-Buch, Berlin, Germany

22. Clinic of Orthopedics, University Hospital Essen, West German Cancer Centre, Essen, Germany

23. Department of Oncology and Hematology, University Children's Hospital Basel, Basel, Switzerland

24. Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, Muenster, Germany

25. Department of Thoracic Surgery, Ruhrlandklinik, University Hospital Essen, Essen, Germany

26. Department of Pediatrics, St Anna Children's Hospital and Children's Cancer Research Institute, Medical University of Vienna, Vienna, Austria

27. Centre for Clinical Trials (ZKS) Muenster, University of Muenster, Muenster, Germany

28. Department of Pediatric Hematology, Oncology and Hematopoietic Stem Cell Transplantation, Princess Elisabeth Children's Hospital, Ghent University, Ghent, Belgium

29. Department of Medical Oncology, Sarcoma Center, University of Duisburg-Essen, Essen, Germany

30. West German Cancer Centre (WTZ) Network, Essen and Muenster, Germany

31. Department of Orthopaedics, Semmelweis University, Budapest, Hungary

32. General Pediatrics, Oncology and Hematology, Vestische Kinder und Jugendklinik Datteln, Witten/Herdecke University, Datteln, Germany

33. Chris O'Brien Lifehouse, Camperdown, Australia

34. Sydney Medical School, University of Sydney, Sydney, Australia

35. Paediatrics III, University Hospital Essen, Essen, Germany

36. German Consortium for Translational Cancer Research (DKTK), German Cancer Research Centre, Essen, Germany

37. Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), Essen, Germany

38. Center for Pediatric Oncology and Hematology, Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania

39. Institute of Clinical Medicine, Vilnius University, Vilnius, Lithuania

40. Department of Clinical Radiology, Klinikum Ibbenbüren, Ibbenbüren, Germany

41. Hematology and Stem Cell Transplantation, New Children's Hospital, HUS Helsinki University Hospital, University of Helsinki, Helsinki, Finland

42. Department of Pediatrics, University Hospital Erlangen, Erlangen, Germany

43. Division of Translational Pathology, Gerhard-Domagk-Institute of Pathology, University Hospital Muenster, Muenster, Germany

44. Department of Clinical Sciences, Skåne University Hospital, Lund, Sweden

45. Department of Medical Oncology, Chris O'Brien Lifehouse, Sydney, Australia

46. Faculty of Medicine and Health, University of Sydney, Sydney, Australia

Abstract

PURPOSE Ewing 2008R3 was conducted in 12 countries and evaluated the effect of treosulfan and melphalan high-dose chemotherapy (TreoMel-HDT) followed by reinfusion of autologous hematopoietic stem cells on event-free survival (EFS) and overall survival in high-risk Ewing sarcoma (EWS). METHODS Phase III, open-label, prospective, multicenter, randomized controlled clinical trial. Eligible patients had disseminated EWS with metastases to bone and/or other sites, excluding patients with only pulmonary metastases. Patients received six cycles of vincristine, ifosfamide, doxorubicin, and etoposide induction and eight cycles of vincristine, actinomycin D, and cyclophosphamide consolidation therapy. Patients were randomly assigned to receive additional TreoMel-HDT or no further treatment (control). The random assignment was stratified by number of bone metastases (1, 2-5, and > 5). The one-sided adaptive-inverse-normal-4-stage-design was changed after the first interim analysis via Müller-Schäfer method. RESULTS Between 2009 and 2018, 109 patients were randomly assigned, and 55 received TreoMel-HDT. With a median follow-up of 3.3 years, there was no significant difference in EFS between TreoMel-HDT and control in the adaptive design (hazard ratio [HR] 0.85; 95% CI, 0.55 to 1.32, intention-to-treat). Three-year EFS was 20.9% (95% CI, 11.5 to 37.9) in TreoMel-HDT and 19.2% (95% CI, 10.8 to 34.4) in control patients. The results were similar in the per-protocol collective. Males treated with TreoMel-HDT had better EFS compared with controls: median 1.0 years (95% CI, 0.8 to 2.2) versus 0.6 years (95% CI, 0.5 to 0.9); P = .035; HR 0.52 (0.28 to 0.97). Patients age < 14 years benefited from TreoMel-HDT with a 3-years EFS of 39.3% (95% CI, 20.4 to 75.8%) versus 9% (95% CI, 2.4 to 34); P = .016; HR 0.40 (0.19 to 0.87). These effects were similar in the per-protocol collective. This observation is supported by comparable results from the nonrandomized trial EE99R3. CONCLUSION In patients with very high-risk EWS, additional TreoMel-HDT was of no benefit for the entire cohort of patients. TreoMel-HDT may be of benefit for children age < 14 years.

Publisher

American Society of Clinical Oncology (ASCO)

Subject

Cancer Research,Oncology

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