Delayed Radiation Necrosis 7 Years After Gamma Knife Surgery for Arteriovenous Malformation : Two Case Reports
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概要
- 論文の詳細を見る
A 44-year-old woman and a 55-year-old woman were treated with gamma knife surgery (GKS) for occipital arteriovenous malformation (AVM). Angiography confirmed complete nidus obliterations 2 years after GKS. However, both patients complained of chronic headache and visual symptoms from around 7 years after GKS. Magnetic resonance imaging showed round masses with or without cystic change surrounded by large areas of brain edema. Angiography also showed complete obliteration of AVM at this time. Extended corticosteroid treatment failed to control the edema. Both patients underwent total surgical removal of the mass. Visual disturbance and chronic headache improved postoperatively and the brain edema rapidly subsided. The histological diagnosis was radiation necrosis in both cases, attributed to the low conformity index and large 12-Gy volume due to usage of a large collimator for GKS. These cases of delayed radiation necrosis after GKS suggest that surgical removal of necrotic lesions is necessary for radiation necrosis intractable to medical treatment.
- 社団法人 日本脳神経外科学会の論文
- 2010-01-15
著者
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ARITA Kazunori
Department of Neurosurgery, Kagoshima University Faculty of Medicine
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Arita Kazunori
Department Of Earth And Planetary Sciences Hokkaido University
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OYOSHI Tatsuki
Department of Neurosurgery, Faculty of Medicine, Kagoshima University
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YATSUSHIRO Kazutaka
Department of Neurosurgery, Graduate School of Medical and Dental Sciences, Kagoshima University
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Yatsushiro Kazutaka
Department Of Neurosurgery Faculty Of Medicine University Of Kagoshima
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Oyoshi Tatsuki
Department Of Neurosurgery Faculty Of Medicine Kagoshima University
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Oyoshi Tatsuki
Department Of Neurosurgery Graduate School Of Medical And Dental Sciences Kagoshima University
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HIRAHARA Kazuho
Department of Neurosurgery, Kagoshima City Hospital
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UETSUHARA Koichi
Department of Neurosurgery, Kagoshima City Hospital
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Hirahara Kazuho
Department Of Neurosurgery Kagoshima City Hospital
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Hirahara Kazuho
Department Of Neurosurgery Faculty Of Medicine University Of Kagoshima
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Uetsuhara Koichi
Department Of Neurosurgery Kagoshima City Hospital
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