頰部に発生した筋上皮腫の1例

• Published in: 日本口腔外科学会雑誌 Vol. 65; no. 1; pp. 40 - 44
• Main Authors: 大谷, 泰志, 吉賀, 大午, 矢田, 直美, 松尾, 拡, 冨永, 和宏, 吉岡, 泉
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 20.01.2019
• Subjects: 筋上皮腫; 頰腺; 頰部
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.65.40

Myoepithelioma is a rare salivary gland tumor that arises mainly in the parotid gland and palate. We report a case of myoepithelioma in the buccal space. A 54-year-old woman presented with a painless elastic-hard mass in the right buccal space. The mass was well defined and showed no ulcer in buccal mucosa. Excisional biopsy was performed under the clinical diagnosis of a tumor in the buccal space. Macroscopically, the tumor was solid and nodular, surrounded by a thin fibrous capsule. Histopathologically, the tumor consisted of spindle cells. Immunohistochemical staining was positive for α-SMA, calponin, CK14, p63, vimentin and S-100 protein. The tumor was diagnosed as a myoepithelioma (spindle cell type) arising in the buccal gland. Healing was uneventful, and no recurrence was noted after 2 years 9 months of follow-up.