How to name it: a rare case of odontogenic cyst.

Odontogenic cysts and tumors are well-recognized entities to the specialist oral pathologist and they seldom pose problems in differential diagnosis. This paper deals with an aggressive cystic lesion in the maxilla of a 65-year-old male that was characterized by a large radiographically multilocular lesion and a multicystic pattern microscopically. The categorization of this lesion was complicated by the presence of features suggestive of both glandular odontogenic cyst and cystic ameloblastoma with aggressive histologic phenotypes.