舌背部に発生した骨軟骨性分離腫の1例

概要

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Lingual osteocartilaginous choristoma is a very rare lesion. In Japan, only 5 cases have been reported previously. We report a case of osteocartilaginous choristoma arising on the dorsum of the tongue. A 58-year-old woman was referred to our clinic because of a painless mass on the dorsum of the tongue. There was a firm mass approximately 10 mm in diameter, covered with normal lingual mucosa on the dorsal surface of the tongue.Extirpation of the tumor was performed with the patient under general anesthesia. The tumor was easily separated from the surrounding lingual tissues. Histopathological examination revealed the characteristics of lamellar bone and hyaline cartilage with adipose tissue. We diagnosed this tumor to be an osteocartilaginous choristoma.The postoperative course was uneventful, with no sign of recurrence for 9 months after surgery.