上顎洞原発髄膜腫の一症例

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A case of primary meningioma in the right maxillary sinus is reported. A 19-year-old man complained of a bulging of his right upper gingiva and cheek of three months duration. There were no tenderness and no any other nasal symptoms. The bony hard and clear margined tumor was palpated at his upper gingiva. He had no history of traumatic head injury. The radiological examination revealed a round shadow in the right maxillary sinus without any bone destructions. The tumor was surgically removed. The pathological findings revealed spindle shaped tumor cells, cellular whorl, and bone and calcification granules. The tumor was histologically diagnosed as fibroblastic meningioma. Several hypotheses have been prop o sed on the tumor origin of the extracranial meningioma. Some cases of meningioma originating from the fibroblast or Schwann's cell have been reported. In the present case the tumor was considered to have originated from the mesenchymal cells of the maxillary sinus mucosa or the anterior maxillary wall.
耳鼻咽喉科臨床学会の論文