頬粘膜下に生じた筋上皮腫の1例

概要

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The patient was a 41-year-old man presenting with a mass beneath the right buccal mucosa. The mass was soft and regular, with no tenderness. On T1-weighted MRI, the mass showed the same degree of signal intensity as muscle. After administration of Gd-DTPA, the mass showed enhancement. T2-weighted MRI showed slightly higher signal intensity than muscle. The clinical diagnosis was a benign tumor beneath the buccal mucosa. The tumor was removed with the patient under general anesthesia. The histopathological diagnosis was myoepithelioma. Immunohistochemically, KL-1, vimentin, S-100 protein, and CAM5.2 showed positive staining. Glial fibrillary acidic protein, p63, and α-SMA were partially positive. The MIB-1 index was < 5 %. As of 1 year postoperatively, the patients progress has been good, without recurrence.
Japanese Society of Oral and Maxillofacial Surgeonsの論文