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I.はじめに
神経鞘腫は末梢神経,脊髄神経後根そして脳神経では聴神経が好発部位である.三叉神経,舌咽神経,迷走神経にも比較的稀に発生するが,舌下神経鞘腫は極めて稀である17).著者の検索した範囲ではわずか16例にすぎない1,6,9,12-15,18,20,22,23).また本腫瘍は舌下神経管がある大後頭孔縁に位置し,その解剖学的特性により複雑な神経症状,いわゆるforamen magnum syndromeを呈し,脱髄疾患,頸椎症等に誤診されることも決して稀ではない9,16).著者らはforamen magnum tumorとしての多彩な臨床像を示した舌下神経鞘腫を全摘出した症例を経験したので報告する.
A case of intracranial hypoglossal neurinoma was reported and the literature was reviewed.
A 46-year-old woman with a three-year history of suboccipital pain, dizziness, blurred vision, swallowing disturbance, dysarthria, dysesthesia and weakness of the four extremities, was admitted to our hospital on July 9, 1978. General physical examinations on admission were unremarkable.Cafe au lait spot was not found. Neurological examination revealed nystagmus, ataxic gait and impairment of the finger to nose test on the right side. Atrophy of the tongue with fasciculation on the right side was also noted.
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