A case of mucinous cystadenoma arising from the retromolar region

Mucinous cystadenoma commonly occurs in the grandular system, including the appendix, ovary, kidney, and pancreas. It is considered a benign tumor. In the head and neck region, it is rare but sometimes occurs in the parotid glands and the minor salivary glands. We report a case of mucinous cystadenoma occurring in the retromolar region. A 73-year-old woman was referred to our hospital in August 2005 because of a mass in the retromolar region. Intraoral examination revealed an enlarged mass measuring about 20 × 15 mm and covered with normal mucosa in the retromolar region. A benign tumor was suspected clinically. The mass was resected under general anesthesia. Histopathologically, it was diagnosed as a mucinous cystadenoma. There was no evidence of recurrence 60 months after operation.