Mucoepidermoid carcinoma of the anal canal: A case report and review of the literature.

Mucoepidermoid carcinoma of the anal canal is a rare tumor. We herein report the case of a 74-year-old male patient with a high-grade mucoepidermoid carcinoma of the anal canal who was treated by local surgical resection and subsequent irradiation. However, the patient succumbed to liver and lung metastases 2 years after the procedure. The characteristic findings of mucoepidermoid carcinoma of the anus remain unclear to date due to rarity of this tumor. Since 1954, when this type of tumor was first described, only 58 cases of patients diagnosed with mucoepidermoid carcinoma of the anus have been reported to date. In this context, a review of the existing English literature on this rare tumor was also performed.