
Adenomatoidodontogenic tumor (AOT) is a relatively rare, benign, hamartomatous, and cystic odontogenic neoplasm that was first described more than a century ago. The lesion still continues to intrigue experts with its varied histomorphology and controversies regarding its development. The present article describes threecases of AOT with an unusual locationin maxillary sinus and the other two cases associated with an impacted canine.The rarity of AOT, association of this lesion with regards to maxillary sinus in one of the cases, the exaggerated size at presentation, uneventful healing of the bony defect makes this cases unique.