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Peripheral odontogenic keratocyst

A Chehade¹, T D Daley, G P Wysocki

¹McGill University, Montreal, Quebec, Canada.

Oral Surgery, Oral Medicine, and Oral Pathology

|May 1, 1994

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The gingival cyst of the adult, typically nonkeratinized, can rarely present with keratinized features. This study suggests these variants are distinct, proposing the term peripheral odontogenic keratocyst for better classification.

Area of Science:

Oral Pathology
Odontogenic Cysts
Histopathology

Background:

Gingival cysts of the adult (GCA) share epithelial lining similarities with lateral periodontal cysts.
GCA are generally nonkeratinized, but rare keratinized variants exist.
These keratinized GCA variants are increasingly recognized as distinct entities.

Purpose of the Study:

To analyze six cases of gingival cysts with odontogenic keratocyst (OKC) histologic features.
To differentiate the biologic behavior of keratinized GCA variants from typical GCA.
To propose a more accurate terminology for these specific lesions.

Main Methods:

Histopathologic examination of six gingival cyst specimens.
Comparison of histologic features with established criteria for OKC.

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Clinical and radiographic data review (where available).

Main Results:

All six cases exhibited histologic features consistent with odontogenic keratocyst.
These cases demonstrated distinct biologic behavior compared to typical nonkeratinized GCA.
The term peripheral odontogenic keratocyst is suggested to accurately describe this subset.

Conclusions:

The keratinized variant of gingival cyst of the adult represents a distinct entity.
Histologic features align with odontogenic keratocyst.
Peripheral odontogenic keratocyst is a proposed, more accurate designation for these lesions.