J Korean Assoc Oral Maxillofac Surg 2017; 43(5): 336~342
Temporomandibular joint synovial chondromatosis extending to the temporal bone: a report of two cases
Dae-Hoon Kim1, Eun Hee Lee1, Eunae Sandra Cho2, Jae-Young Kim1, Kug-Jin Jeon3,4, Jin Kim2, Jong-Ki Huh1
1Department of Oral and Maxillofacial Surgery, Gangnam Severance Hospital, Yonsei University College of Dentistry,
2Department of Oral Pathology, Oral Cancer Research Institute, Yonsei University College of Dentistry,
3Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul,
4Department of Dentistry, Yongin Severance Hospital, Yongin, Korea
Jong-Ki Huh
Department of Oral and Maxillofacial Surgery, Gangnam Severance Hospital, Yonsei University College of Dentistry, 211 Eonju-ro, Gangnamgu, Seoul 06273, Korea
TEL: +82-2-2019-4560 FAX: +82-2-3463-4052
E-mail: omshuh@yuhs.ac
ORCID: http://orcid.org/0000-0002-7381-3972
Received June 30, 2017; Revised August 9, 2017; Accepted September 11, 2017.; Published online October 31, 2017.
© Korean Association of Oral and Maxillofacial Surgeons. All rights reserved.

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.
Synovial chondromatosis is a rare benign lesion originating from the synovial membrane. It presents as adhesive or non-adhesive intra-articular cartilaginous loose bodies. Although the causes of synovial chondromatosis have not been fully elucidated, inflammation, external injury, or excessive use of joints have been suggested as possible causes. Synovial chondromatosis has been reported to occur most frequently at large joints that bear weights, with a rare occurrence at the temporomandibular joint (TMJ). When synovial chondromatosis develops at TMJ, clinical symptoms, including pain, joint sounds, and mouth opening may common. Moreover, synovial chondromatosis rarely spreads to the mandibular condyle, glenoid cavity, or articular eminence of TMJ. The goal of this study was to discuss the methods of surgery and other possible considerations by reviewing cases of patients who underwent surgery for synovial chondromatosis that extended to the temporal bone.
Keywords: Synovial chondromatosis, Temporal bone, Temporomandibular joint

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