Orthokeratinized Odontogenic Cyst of Maxilla: A Case Report

Abstract

Background: A variety of Odontogenic cysts frequently present in the jaws. Cysts that develop from epithelial tissues involved in tooth formation are classified as "Odontogenic" and can be inflammatory or developmental in origin. The OKC is a very different form of developmental Odontogenic cyst because of peculiar clinical behavior, distinctive origin and development, specific histopathological features, unique tendency for recurrence and disputed treatment modalities. Orthokeratinized Odontogenic cyst is a relatively rare developmental Odontogenic cyst which was initially considered as Orthokeratinized type of OKC by WHO-1992, and later on OKC as KCOT in WHO-2005 classification, but now it is designated as different entity from OKC as OOC in WHO-2017 classification of head and neck region of Odontogenic tumors. Here we present a clinically diagnosed case of maxillary sinusitis which turned out to be Orthokeratinized Odontogenic cyst on histopathological examination.