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Journal of Clinical Oncology, Vol 24, No 10 (April 1), 2006: pp. 1554-1560 © 2006 American Society of Clinical Oncology. DOI: 10.1200/JCO.2005.04.8074 Role of Radiotherapy in Supratentorial Primitive Neuroectodermal Tumor in Young Children: Results of the German HIT-SKK87 and HIT-SKK92 Trials
From the Department of Radiation Oncology and the Institute for Medical Information Processing, University of Tübingen, Tübingen; Department of Radio-Oncology, University of Leipzig, Leipzig; Children's Hospital and Reference Center for Neuroradiology, Department of Neuroradiology, University of Würzburg, Würzburg; National Reference Centre for Brain Tumors, Department of Neuropathology, University of Bonn, Bonn, Germany; Division of Pediatric Hematology/Oncology, Department of Pediatrics and Adolescence Medicine, Children's Hospital, Medical University of Graz, Graz, Austria; Division of Radiation Medicine, Paul Scherrer Institute, Villigen, Switzerland Address reprint requests to Beate Timmermann, MD, Division of Radiation Medicine, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland; e-mail: beate.timmermann{at}psi.ch PURPOSE: To assess the outcome of young children with supratentorial primitive neuroectodermal tumor (stPNET) treated by intensive postoperative chemotherapy alone compared with treatment with chemotherapy and delayed radiotherapy (RT). PATIENTS AND METHODS: From 1987 to 1992, children younger than 3 years of age with stPNET were enrolled in the HIT-SKK87 trial in Germany and Austria. After surgery, low-risk patients received maintenance chemotherapy before RT. In high-risk patients, intensive induction chemotherapy was followed by maintenance chemotherapy until delayed RT was initiated. In the following trial, HIT-SKK92 methotrexate-based chemotherapy was applied. In children with complete remission after three cycles, therapy was finished without irradiation. Otherwise, radiotherapy or salvage chemotherapy was administered. RESULTS: Twenty-nine children were eligible (age, 3.0 to 37.0 months). All children received chemotherapy. In 15 children, no RT was administered. Four children had tumor progression during chemotherapy and underwent irradiation. In 10 patients, RT was given after chemotherapy. Overall survival (OS) and progression-free survival (PFS) rates after 3 years were 17.2% and 14.9%, respectively. Twenty-four children relapsed (13 at the tumor site only, three at distant site, and eight at both local and distant sites). Positive impact on survival was observed in children with complete resection but without statistical significance. Administration of RT was the only significant predictive factor for OS and PFS. Only one child not having RT survived. CONCLUSION: Outcome of infants and babies with stPNET is unsatisfactory. Omission of RT jeopardizes survival, even if intensive chemotherapy is applied. We suggest to limit any delay of RT to a maximum of 6 months even in young children. Presented at the 12th European Conference on Clinical Oncology, Copenhagen, Denmark, September 21-25, 2003. Authors' disclosures of potential conflicts of interest and author contributions are found at the end of this article.
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Copyright © 2006 by the American Society of Clinical Oncology, Online ISSN: 1527-7755. Print ISSN: 0732-183X
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