Orthokeratinized Odontogenic Cyst: A Rarity

Abstract

Orthokeratinized odontogenic cyst (OOC) was first identified as the rare variant of keratocystic odontogenic tumor (KCOT) for its different histopathology and rare recurrence which was reclassified by WHO in 2005. The orthokeratinized odonto genic cyst is a distinct clinicopathologic entity and is histo logically characterized by a thin, uniform, epithelial lining with orthokera­ tinization and a subjacent granular cell layer. The basal cells are usually cuboidal or flattened. OOC in maxilla is rare. This article presents a case of 56­years­old male patient with OOC in left maxilla. The clinical, radiographic and histological features of the cyst are discussed in this case report.