咬筋内に発生した神経鞘腫の1例

DOI Web Site Web Site 参考文献15件
  • 川﨑 誠
    鳥取大学医学部附属病院歯科口腔外科
  • 渡辺 聡
    公立八鹿病院歯科口腔外科
  • 稲村 昌伸
    公立八鹿病院歯科口腔外科
  • 吉田 優
    独立行政法人国立病院機構米子医療センター
  • 小谷 勇
    鳥取大学医学部感覚運動医学講座口腔顎顔面外科学分野

書誌事項

タイトル別名
  • A case of schwannoma arising in the masseter muscle
  • コウキン ナイ ニ ハッセイ シタ シンケイ サヤ シュ ノ 1レイ

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<p>Schwannoma is a benign tumor developing from the Schwann’s sheath of peripheral nerves, constituted of Schwann cells and collagen fibrous matrix. The frequency of occurrence in the oral region is high in the tongue, while rare in the masseter muscle. Here, we report a case of schwannoma in the left masseter muscle. The patient was a 64-year-old man with indolent swelling of the left cheek, measuring 50×45 mm. Magnetic resonance imaging showed a 44 mm tumor with a clear margin. T1-weighted imaging showed a homogeneous signal similar to muscle, while T2-weighted imaging showed an internal non-homogeneous, low signal at the center. The tumor was removed from outside the mouth under general anesthesia. Motor nerve paralysis of the lower lip appeared after surgery but disappeared in two months. The tumor was covered with a capsule, and there was no adhesion with the surrounding tissue. Neural tissue was not found near the tumor. The histopathological diagnosis was schwannoma. Recurrence has not been observed in the 5 years and 11 months after surgery.</p>

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