Abstract
Mucoepidermoid carcinomas frequently occur in the minor salivary and parotid glands, but rarely occur in the sublingual glands. As these carcinomas do not exhibit sufficiently distinctive clinical features, a prompt histopathological diagnosis is important for effective treatment. Here, we report a rare case of low-grade mucoepidermoid carcinoma arising from the sublingual gland. A 47-year-old man was referred to our department with the chief complaint of swelling on the right oral floor. Clinical examination revealed a hard and painless elastic mass on the right sublingual gland. On computed tomography and magnetic resonance imaging, a sharply circumscribed oval lesion was observed in the right sublingual gland area. Following a biopsy, low-grade mucoepidermoid carcinoma was diagnosed, and the lesion was excised. On histopathological analysis, the sublingual gland tumor consisted of proliferative dermoid, intermediate, and mucous cells. No evidence of recurrence or symptoms has been seen 1 year and 9 months since the operation.
