Abstract
Cystic or tumorous lesions develop from the odontugenic tissues, including enamel organ, dental lamina and enamel epithelium, with embedded teeth. This paper reports on the case of a disease in third molar region of the right mandible of a 14-year-old boy.
On the first examination it was diagnosed as a deritigerous cyst by X-ray finding, but postoperative histopatliology revealed three different epitheliums in the fibrous tissue. Immunohistochemically examination of this lesion, one of the epithelium showed positive staining with anti-keratin and vimentin antibodies. In this report, we mentioned the difficulty of clinical diagnosis and the importance of histopathological and immunohistochemical examinations.