Orthokeratinized Odontogenic Cyst of the Mandible – Case Report with Unusual Histopathologic Features with Review
P. Sai Krishna1, K. A Shankar1, N. Balachander2

1Tagore dental college and Hospital, Chennai, Tamilnadu, India. 2Sree Balaji Dental College  Hospital, Bharath University, Chennai.

Abstract: Orthokeratinized odontogenic cysts(OOC’s) are relatively uncommon developmental cysts lined with orthokeratinized epithelium consisting of prominent granular layer and a basal layer of low cuboidal flattened cells that show no tendency for nuclear palisading. OOC’s has been considered a distinct entity from odontogenic keratocyst since they exhibit a less aggressive behavior and a very low recurrence rate. This report describes a 27 year old female patient who presented with a cyst with unique histopathological features. The purpose of this article is to present a case of OOC in the posterior mandible and also emphasize on the need for differentiating it from keratocystic odontogenic tumor(KCOT) with a comprehensive literature review.

Keywords: odontogenic cyst; orthokeratinizedodontogenic cyst; keratocysticodontogenic tumor

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