Abstract
Two cases of osseous choristoma that developed in the tongue are reported.
Patient 1 was a 21-year-old female. She consulted us complaining of a mass at the tongue dorsum. A pedunculated lesion of 6 mm in size was observed on the left dorsum of the posterior tongue. The lesion was a bony-hard mass with smooth surface and was identified as a high-density lesion by CT examination. Clinical diagnosis of an osseous choristoma of the tongue was made, and the lesion was excised under general anesthesia. The postoperative course was uneventful.
Patient 2 was a 14-year-old female. She was referred to us for evaluation of the left molar region of the maxilla. CT examination revealed a high-density lesion at the posterior tongue in addition to an odontoma adjacent to the left wisdom tooth of the maxilla. Oral examination showed a pedunculated bony-hard mass with smooth surface of 6mm in size on the right dorsum of the posterior tongue. A diagnosis of osseous choristoma together with odontoma at the left maxilla was made, and the tongue lesion was excised under general anesthesia. The postoperative course was uneventful.
Histopathologically, both of the lesions consisted of mature dense bone with lamellar structure covered with a thin layer of squamous epithelium. These features were consistent with those of osseous choristoma.
