Adenomatoid odontogenic tumor mimicking a dentigerous cyst.

Adenomatoid odontogenic tumor (AOT) is a slow-growing, asymptomatic and uncommon lesion that arises from odontogenic epithelium with inductive effects on connective tissue. The more common variant is the follicular type, which involves an unerupted tooth and is often mistaken for a dentigerous cyst. Histopathologic examination demonstrates cuboidal or spindle-shaped epithelial cells forming aggregates or rosette-like structures with minimal connective tissue, and cuboidal or low columnar cells forming glandular duct-like structures. Treatment is complete enucleation, and recurrences are rare. We presented a case of AOT in a 14-year-old male presenting as a cystic mass around an unerupted tooth.