Ontology type: schema:ScholarlyArticle Open Access: True
2018-12
AUTHORSRami A. El Shafie, Maja Czech, Kerstin A. Kessel, Daniel Habermehl, Dorothea Weber, Stefan Rieken, Nina Bougatf, Oliver Jäkel, Jürgen Debus, Stephanie E. Combs
ABSTRACTBACKGROUND: Meningiomas of the skull base account for 25-30% of all meningiomas. Due to the complex structure of the cranial base and its close proximity to critical structures, surgery is often associated with substantial morbidity. Treatment options include observation, aggressive surgical intervention, stereotactic or conventional radiotherapy. In this analysis we evaluate the outcome of 110 patients with meningiomas of the skull base treated with particle therapy. It was performed within the framework of the "clinical research group heavy ion therapy" and supported by the German Research Council (DFG, KFO 214). METHODS: Between May 2010 and November 2014, 110 Patients with skull base meningioma were treated with particle radiotherapy at the Heidelberg Ion Therapy Center (HIT). Primary localizations included the sphenoid wing (n = 42), petroclival region (n = 23), cavernous sinus (n = 4), sella (n = 10) and olfactory nerve (n = 4). Sixty meningiomas were benign (WHO °I); whereas 8 were high-risk (WHO °II (n = 7) and °III (n = 1)). In 42 cases histology was not examined, since no surgery was performed. Proton (n = 104) or carbon ion (n = 6) radiotherapy was applied at Heidelberg Ion Therapy Center (HIT) using raster-scanning technique for active beam delivery. Fifty one patients (46.4%) received radiotherapy due to tumor progression, 17 (15.5%) after surgical resection and 42 (38.2%) as primary treatment. RESULTS: Median follow-up in this analysis was 46,8 months (95% CI 39,9-53,7; Q1-Q3 34,3-61,7). Particle radiotherapy could be performed safely without toxicity-related interruptions. No grade IV or V toxicities according to CTCAE v4.0 were observed. Particle RT offered excellent overall local control rates with 100% progression-free survival (PFS) after 36 months and 96.6% after 60 months. Median PFS was not reached due to the small number of events. Histology significantly impacted PFS with superior PFS after 5 years for low-risk tumors (96.6% vs. 75.0%, p = 0,02). Overall survival was 96.2% after 60 months and 92.0% after 72 months from therapy. Of six documented deaths, five were definitely not and the sixth probably not meningioma-related. CONCLUSION: Particle radiotherapy is an excellent treatment option for patients with meningiomas of the skull base and can lead to long-term tumor control with minimal side effects. Other prospective studies with longer follow-up will be necessary to further confirm the role of particle radiotherapy in skull base meningioma. More... »
PAGES54
http://scigraph.springernature.com/pub.10.1186/s13014-018-1002-5
DOIhttp://dx.doi.org/10.1186/s13014-018-1002-5
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/29587795
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"description": "BACKGROUND: Meningiomas of the skull base account for 25-30% of all meningiomas. Due to the complex structure of the cranial base and its close proximity to critical structures, surgery is often associated with substantial morbidity. Treatment options include observation, aggressive surgical intervention, stereotactic or conventional radiotherapy. In this analysis we evaluate the outcome of 110 patients with meningiomas of the skull base treated with particle therapy. It was performed within the framework of the \"clinical research group heavy ion therapy\" and supported by the German Research Council (DFG, KFO 214).\nMETHODS: Between May 2010 and November 2014, 110 Patients with skull base meningioma were treated with particle radiotherapy at the Heidelberg Ion Therapy Center (HIT). Primary localizations included the sphenoid wing (n\u00a0=\u200942), petroclival region (n\u00a0=\u200923), cavernous sinus (n\u00a0=\u20094), sella (n\u00a0=\u200910) and olfactory nerve (n\u00a0=\u20094). Sixty meningiomas were benign (WHO \u00b0I); whereas 8 were high-risk (WHO \u00b0II (n\u00a0=\u20097) and \u00b0III (n\u00a0=\u20091)). In 42 cases histology was not examined, since no surgery was performed. Proton (n\u00a0=\u2009104) or carbon ion (n\u00a0=\u20096) radiotherapy was applied at Heidelberg Ion Therapy Center (HIT) using raster-scanning technique for active beam delivery. Fifty one patients (46.4%) received radiotherapy due to tumor progression, 17 (15.5%) after surgical resection and 42 (38.2%) as primary treatment.\nRESULTS: Median follow-up in this analysis was 46,8\u00a0months (95% CI 39,9-53,7; Q1-Q3 34,3-61,7). Particle radiotherapy could be performed safely without toxicity-related interruptions. No grade IV or V toxicities according to CTCAE v4.0 were observed. Particle RT offered excellent overall local control rates with 100% progression-free survival (PFS) after 36\u00a0months and 96.6% after 60\u00a0months. Median PFS was not reached due to the small number of events. Histology significantly impacted PFS with superior PFS after 5 years for low-risk tumors (96.6% vs. 75.0%, p\u00a0=\u00a00,02). Overall survival was 96.2% after 60\u00a0months and 92.0% after 72\u00a0months from therapy. Of six documented deaths, five were definitely not and the sixth probably not meningioma-related.\nCONCLUSION: Particle radiotherapy is an excellent treatment option for patients with meningiomas of the skull base and can lead to long-term tumor control with minimal side effects. Other prospective studies with longer follow-up will be necessary to further confirm the role of particle radiotherapy in skull base meningioma.",
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"name": "Radiation Oncology",
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"name": "Clinical outcome after particle therapy for meningiomas of the skull base: toxicity and local control in patients treated with active rasterscanning",
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