Cystic ameloblastic fibroma

A 17-year-old man was referred to our oral surgery department with a cystic lesion in the right mandible. The patient had no symptoms and the lesion was found incidentally in a routine radiological examination. There was no history of trauma. There was no abnormality on extraoral or intraoral examination. Radiological examination showed a unilocular cyst with well-circumscribed borders associated with an unerupted third molar between the second molar and the ascending ramus (Fig. 1). These findings suggested a dentigerous cyst. Through an intraoral incision the cyst was enucleated, and the associated unerupted tooth was extracted. On macroscopic examination, tissue fragments resembling a cyst wall were seen. On microscopic examination, the cyst had no epithelial lining and the neoplastic tissue had both epithelial and mesenchymal components with a well-circumscribed outer contour (Fig. 2). The mesenchy-