咬筋に発生した顆粒球肉腫例

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タイトル別名
  • A Case of Granulocytic Sarcoma in the Masseter Muscle
  • 臨床 咬筋に発生した顆粒球肉腫例
  • リンショウ コウキン ニ ハッセイ シタ カリュウキュウ ニクシュレイ

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Granulocytic sarcoma is a rare extramedullary tumor associated with acute myeloid leukemia (AML) or myeloproliferative neoplasmas. It may arise from any site in the body, although involvement of the head and neck region is rare.<br> A 7-year-old male presented with the chief complaint of swelling in the left parotid region. Parotid gland tumor was suspected at the first examination, however, CT and MRI showed that the tumor was located in the left masseter muscle. Peripheral blood examination revealed an increased count of leukocytes and myeloblasts. AML was diagnosed based on bone-marrow examination. Histological examination of an open biopsy from the tumor confirmed leukemia-like cells. Based on the findings, a final diagnosis of granulocytic sarcoma of the masseter muscle with AML was made.<br>

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