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Case Reports in Dentistry
Volume 2016, Article ID 3014892, 4 pages
Case Report

Peripheral Calcifying Epithelial Odontogenic Tumour Mimicking a Gingival Inflammation: A Diagnostic Dilemma

1Department of Stomatology, Division of General Pathology, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil
2Unit of Oral and Maxillofacial Surgery, Santa Casa de São Paulo, School of Medical Sciences, São Paulo, SP, Brazil
3Department of Orthodontics and Radiology, University of São Paulo, São Paulo, SP, Brazil

Received 19 July 2016; Revised 12 September 2016; Accepted 22 September 2016

Academic Editor: Adriano Loyola

Copyright © 2016 Danielle Lima Corrêa de Carvalho et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The calcifying epithelial odontogenic tumour (CEOT) is an extremely rare benign neoplasia, accounting for approximately 1% of all odontogenic tumours. CEOT can have two clinical manifestations: central or intraosseous (94% of the cases) and peripheral or extraosseous (6% of the cases). Although the latter is less common, the peripheral variant has been described as an insidious lesion, since it is usually asymptomatic and may be erroneously mistaken with gingival hyperplasia, hamartomas, or even metastasis of malignant neoplasia. We report a case of a young male patient presenting with a peripheral CEOT in the mandibular posterior region, mimicking a located gingival inflammation.