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The Capital Region of Denmark - a part of Copenhagen University Hospital
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Hippocampal sparing radiotherapy for pediatric medulloblastoma: impact of treatment margins and treatment technique

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BackgroundWe investigated how varying the treatment margin and applying hippocampal sparing and proton therapy impact the risk of neurocognitive impairment in pediatric medulloblastoma patients compared with current standard 3D conformal radiotherapy.MethodsWe included 17 pediatric medulloblastoma patients to represent the variability in tumor location relative to the hippocampal region. Treatment plans were generated using 3D conformal radiotherapy, hippocampal sparing intensity-modulated radiotherapy, and spot-scanned proton therapy, using 3 different treatment margins for the conformal tumor boost. Neurocognitive impairment risk was estimated based on dose-response models from pediatric CNS malignancy survivors and compared among different margins and treatment techniques.ResultsMean hippocampal dose and corresponding risk of cognitive impairment were decreased with decreasing treatment margins (P
Original languageEnglish
JournalNeuro-Oncology
Volume16
Issue number4
Pages (from-to)594-602
ISSN1522-8517
DOIs
Publication statusPublished - 2014

ID: 42318547