Cartilaginous choristoma on the lateral surface of the tongue: a case report.

A cartilaginous choristoma is a nonneoplastic nodular growth of histologically normal cartilage in an abnormal site. This report describes a case of a cartilaginous choristoma on the lateral surface of the tongue in a 65-year-old woman. The entire lesion was excised, and histologic examination revealed mature cartilaginous tissue surrounded by dense connective tissue. Choristomas are rare findings in the oral cavity, easily confused with proliferative processes or soft tissue neoplasms. Nevertheless, choristomas may be part of the differential diagnosis for lesions similar to the one described in this case report.