Prognostic Significance of Changes in the Internal Acoustic Meatus Caused by Vestibular Schwannoma
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概要
- 論文の詳細を見る
The prognostic significance of the variety of changes in the internal auditory meatus (IAM) caused by vestibular schwannoma was retrospectively analyzed in 69 consecutive patients with vestibular schwannoma. Preoperative bone-window computed tomography was used to classify IAM changes into extensive destruction (17%), widening (46%), and normal IAM (36%). Extensive destruction (47±19 years) and widening (48±13) occurred in significantly younger patients than normal IAM (59±9). Preoperative hearing was significantly more severely disturbed in patients with extensive destruction than in those with widening or normal IAM. IAM change was significantly related to the tumor consistency, as normal IAM was more common in patients with cystic tumor than in those with solid tumor. Postoperative hearing and facial function were worse in patients with severe IAM change, although the relationship between the IAM change and the surgical result was not significant. One patient with extensive destruction developed postoperative cerebrospinal fluid (CSF) leakage through the air cells around the IAM, and needed surgical repair. Severe IAM change occurs with solid tumor and causes severely disturbed preoperative hearing in younger patients, which reflects the tumor aggressiveness. Severe IAM change increases the technical difficulty of tumor removal and the risk of postoperative CSF leakage, and is associated with a poorer prognosis for patients with vestibular schwannoma.
- 日本脳神経外科学会の論文
- 2002-11-15
著者
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Saeki Naokatsu
Departments Of Neurological Surgery Chiba University School Of Medicine
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Saeki Naokatsu
Department Of Neurosurgery Chiba University School Of Medicine Chiba
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Yamaura Akira
Department Of Neurosurgery Chiba University School Of Medicine
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Yamaura Akira
Department Of Neurological Surgery Chiba University School Of Medicine
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Yamaura Akira
Japan Neurotrauma Data Bank (jntdb) Committee:japan Society Of Neurotraumatology The Japanese Counci
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YAMAKAMI Iwao
Department of Neurosurgery, Chiba University School of Medicine, Chiba
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UCHINO Yoshio
Department of Neurosurgery, Chiba University School of Medicine, Chiba
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KOBAYASHI Eiichi
Department of Neurosurgery, Chiba University School of Medicine, Chiba
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山上 岩男
千葉大学医学研究院脳神経外科学
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Uchino Yoshio
Department Of Neurosurgery Chiba University School Of Medicine
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Yamakami Iwao
Department Of Neurosurgery Chiba University School Of Medicine
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Kobayashi Eiichi
Department Of Neurosurgery Chiba University School Of Medicine
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Saeki Naokatsu
Department Of Neurological Surgery
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Yamaura Akira
Department Of Neurological Surgery
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山上 岩男
千葉大学 大学院医学研究院 脳神経外科
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YAMAURA Akira
Chiba University Graduate School of Medicine
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KOBAYASHI Eiichi
Chiba University Graduate School of Medicine
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Yamakami Iwao
Department Of Neurosurgery Chiba University Graduate School Of Medicine
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Kobayashi Eiichi
Department Of Industrial Chemistry Faculty Of Science And Technology Science University Of Tokyo
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