[An unusual lingual cyst lined by respiratory epithelium].

Apart from several well-established types of developmental cysts in the tongue such as dermoid cyst, lymphoepithelial cyst, and thyroglossal cyst, there are two rare lingual cysts known as lingual cyst of foregut origin and lingual alimentary cyst. In this report, a lingual cyst with a wide involvement of the tongue is presented in a nine-year-old boy with findings of ultrasonography, computed tomography, and magnetic resonance imaging. Postoperative histopathologic examination showed a lingual cyst of foregut origin lined by respiratory epithelium.