咬筋内に発生し下顎切痕部に存在した神経鞘腫の1例

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タイトル別名
  • A case of schwannoma arising in the intramasseteric region that progressed to the mandibular notch
  • コウキン ナイ ニ ハッセイ シ カガクセツコンブ ニ ソンザイ シタ シンケイ サヤ シュ ノ 1レイ

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Schwannoma is a benign tumor originating in Schwann cells of neurilemma. Schwannoma arising in the masseteric muscle is relatively rare. In this paper, a case of schwannoma arising in the masseteric muscle located at the mandibular notch is reported. A 16-year-old girl was referred to us because of a slight swelling in front of the left tragus. We found and palpated a cherry-sized elastic hard tumor located beneath the left zygomatic arch. Magnetic resonance imaging revealed a 23 × 15 mm solid tumor with a clear margin. The tumor was located from the left masseter muscle to the mandibular notch.<br>The tumor was removed through an intraoral approach with the patient under general anesthesia. To secure an operative field, the left coronoid process was removed. The range of jaw movement recovered within 3 months postoperatively. The histopathological diagnosis was schwannoma. The postoperative course was uneventful, with no evidence of tumor recurrence.

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