Stereotactic Radiosurgery for Skull Base Meningioma
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- IGAKI Hiroshi
- Department of Radiology, Teikyo University School of Medicine
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- MARUYAMA Keisuke
- Department of Neurosurgery, The University of Tokyo Hospital
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- KOGA Tomoyuki
- Department of Neurosurgery, The University of Tokyo Hospital
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- MURAKAMI Naoya
- Department of Radiology, The University of Tokyo Hospital
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- TAGO Masao
- Department of Radiology, The University of Tokyo Hospital
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- TERAHARA Atsuro
- Department of Radiology, The University of Tokyo Hospital
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- SHIN Masahiro
- Department of Neurosurgery, The University of Tokyo Hospital
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- NAKAGAWA Keiichi
- Department of Radiology, The University of Tokyo Hospital
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- OHTOMO Kuni
- Department of Radiology, The University of Tokyo Hospital
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Author(s)
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- IGAKI Hiroshi
- Department of Radiology, Teikyo University School of Medicine
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- MARUYAMA Keisuke
- Department of Neurosurgery, The University of Tokyo Hospital
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- KOGA Tomoyuki
- Department of Neurosurgery, The University of Tokyo Hospital
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- MURAKAMI Naoya
- Department of Radiology, The University of Tokyo Hospital
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- TAGO Masao
- Department of Radiology, The University of Tokyo Hospital
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- TERAHARA Atsuro
- Department of Radiology, The University of Tokyo Hospital
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- SHIN Masahiro
- Department of Neurosurgery, The University of Tokyo Hospital
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- NAKAGAWA Keiichi
- Department of Radiology, The University of Tokyo Hospital
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- OHTOMO Kuni
- Department of Radiology, The University of Tokyo Hospital
Abstract
Stereotactic radiosurgery is now a treatment option for meningiomas, especially for high-risk patients such as those with skull base lesions. The clinical outcomes were retrospectively analyzed of stereotactic radiosurgery using the Leksell Gamma Knife<sup>®</sup> performed for 98 patients with 106 skull base meningiomas at the University of Tokyo Hospital between June 1990 and April 2006 and followed up for more than a year. After a median follow-up period of 53.2 months (range 12.2-204.4 months), local tumor control rates were 86.9% and 78.9% at 5 years and 10 years, respectively. Tumors with volume of 4 cm<sup>3</sup> or smaller (97.5% vs. 76.1% at 5 years, p = 0.001) and tumors completely included within the isodose line of 14 Gy or more (97.5% vs. 67.2% at 5 years, p = 0.0006) had higher local control rates. Postoperative residual tumors treated by stereotactic radiosurgery were controlled in all 25 cases. Cranial nerve deficits were improved, stable, and deteriorated in 12, 64, and 3 patients, respectively, after stereotactic radiosurgery. Stereotactic radiosurgery was effective treatment method for local control of skull base meningiomas, especially for small or postoperative residual tumors. Correct combination of microsurgery and radiosurgery leads to excellent local control.<br>
Journal
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- Neurologia medico-chirurgica
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Neurologia medico-chirurgica 49(10), 456-460, 2009-10-15
The Japan Neurosurgical Society
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