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An Official Publication of the Indian Association of Oral and Maxillofacial Pathologists

ORIGINAL ARTICLE Table of Contents   
Year : 2014  |  Volume : 18  |  Issue : 3  |  Page : 365-371
Cytokeratin 14 and cytokeratin 18 expressions in reduced enamel epithelium and dentigerous cyst: Possible role in oncofetal transformation and histogenesis- of follicular type of adenomatoid odontogenic tumor

1 Department of Oral Pathology and Microbiology, Subbaiah Institute of Dental Sciences, Shimoga, Karnataka, India
2 Department of Anaesthesia, Subbaiah Institute of Medical Sciences, Shimoga, Karnataka, India
3 Department of Oral Pathology and Microbiology, Coorg Institute of Dental Sciences, Virajpet, Karnataka, India
4 Department of Oral Pathology, Rishiraj Dental College, Bhopal, Madhya Pradesh, India
5 Department of Oral and Maxillofacial Surgery, Subbaiah Institute of Dental Sciences, Shimoga, Karnataka, India

Correspondence Address:
D K Shruthi
Department of Oral Pathology and Microbiology, Subbaiah Institute of Dental Sciences, 3 Cross, SSS Mansion Basaweshwara Nagar, Shimoga 577201, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0973-029X.151330

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Introduction: Odontogenic cysts and tumors arise from the structures and remnants associated with tooth development. Cysts and tumors derived from the odontogenic tissues constitute an unusually diverse group of lesions. This diversity reflects the complex development of the dental structures, since all these lesions originate through some alteration from the normal pattern of odontogenesis. Cytokeratin (CK) 14 is the typical intermediary filament of odontogenic epithelium, CK 18 is the major components of the intermediate filaments of simple or single layered epithelial tissue; it is not expressed in stratified squamous epithelium. The present study was undertaken to understand the expression pattern of these cytokeratins in dentigerous cyst, dental follicular tissue, adenomatoid odontogenic tumor (AOT) and unicystic ameloblastoma. Materials and Methods: The present study consists of 60 specimens consisting of 20 samples of Dentigerous cyst, 20 samples of Reduced enamel epithelium/dental follicles, 10 samples of Follicular type of AOT, 10 samples of unicystic ameloblastoma. The sections of these specimens were stained for CK 14 and CK 18. The number of cells positive for CK 14 and CK 18 was counted per 100 cells. The cells were counted in four randomly selected high-power fields and the mean was calculated. Scoring of cytokeratin 14 expressions was done using Remmele score. Results: The highest expression of cytokeratin 14 was noted in AOT, least was seen in dental follicle/Reduced enamel epithelium (REE). CK18 was negative in all the cases included in the present study. Conclusion: In the present study, the expression of CK14 was noted in AOT, Dentigerous cyst (DC), Unicystic Ameloblastoma (UCA) and Dental follicle/REE. The expressions between these lesions were compared. These expression pattern may provide an insight to the histogenesis of AOT.

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Journal of Oral and Maxillofacial Pathology | Published by Wolters Kluwer - Medknow
Online since 15th Aug, 2007