Abstract
We report a case of lingual osseous choristoma, a rare benign lesion. A 32-year-old woman was referred to our clinic because of a painless polypous tumor on the posterior part of the dorsum of the tongue. There was an elastic hard mass approximately 5mm in diameter on the left side of the cecal foramen of the tongue. We performed excision of the tumor with the patient under local anesthesia. Histologically, the lesion was a well-circumscribed mass of dense lamellar bone with Haversian canals. The postoperative course was uneventful, with no recurrence for about 18 months. Since 1938, when Muta reported the first case in Japan, 37 cases of oral osseous choristoma have been reported, including 34 arising on the tongue. The clinical findings of lingual osseous choristomas were reviewed, and their pathophysiology was discussed.
