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A Case of Epidermoid Cyst Initially Misdiagnosed as Temporomandibular Joint Disorder
J Oral Med Pain 2018;43:56-60
Published online June 30, 2018;  https://doi.org/10.14476/jomp.2018.43.2.56
© 2018 Korean Academy of Orofacial Pain and Oral Medicine

Yun-Jeong Choi1, Seo-young An2, Jin-Seok Byun1, Jae-Kwang Jung1, Jae-Kap Choi1

1Department of Oral Medicine, School of Dentistry, Kyungpook National University, Daegu, Korea
2Department of Oral and Maxillofacial Radiology, School of Dentistry, Kyungpook National University, Daegu, Korea
Correspondence to: Jae-Kap Choi
Department of Oral Medicine, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-daero, Jung-gu, Daegu 41940, Korea
Tel: +82-53-600-7321
Fax: +82-53-426-2195
E-mail: jhchoi@knu.ac.kr
Received June 7, 2018; Revised June 20, 2018; Accepted June 20, 2018.
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Epidermoid cyst in bony wall of external auditory canal (EAC) is a very rare pathologic condition. In addition to its extreme rarity, its positional proximity to temporomandibular joint (TMJ) might lead to clinical misdiagnosis as TMJ disorders, especially when it is accompanied by temporomandibular disorders-like symptoms. In this article, we report a patient with epidermoid cyst in anterior bony wall of EAC, which was misdiagnosed as TMJ disorder because the left TMJ pain aggravated during mastication.
Keywords : Epidermoid cyst; External auditory canal; Temporomandibular joint disorders


September 2018, 43 (3)