J Korean Assoc Oral Maxillofac Surg 2019; 45(2): 116~120
Misdiagnosis of ameloblastoma in a patient with clear cell odontogenic carcinoma: a case report
Jong-Cheol Park1, Seong-Won Kim1, Young-Jae Baek1, Hyeong-Geun Lee1, Mi-Heon Ryu2, Dae-Seok Hwang1, Uk-Kyu Kim1
1Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, 2Department of Oral Pathology, BK21 Plus Project, School of Dentistry, Pusan National University, Yangsan, Korea
Uk-Kyu Kim
Department of Oral and Maxillofacial Surgery, Pusan National University Dental Hospital, 20 Geumo-ro, Mulgeum-eup, Yangsan 50612, Korea, TEL: +82-55-360-5100 FAX: +82-55-360-5104, E-mail: kuksjs@pusan.ac.kr
ORCID: https://orcid.org/0000-0003-1251-7843
Received September 7, 2017; Revised November 13, 2017; Accepted November 22, 2017.; Published online April 30, 2019.
© The 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.
Clear cell odontogenic carcinoma (CCOC), a rare tumor in the head and neck region, displays comparable properties with other tumors clinically and pathologically. In consequence, an incorrect diagnosis may be established. A 51-year-old male patient who was admitted to the Department of Oral and Maxillofacial Surgery at Pusan National University Dental Hospital was initially diagnosed with ameloblastoma via incisional biopsy. However, the excised mass of the patient was observed to manifest histopathological characteristics of ameloblastic carcinoma. The lesion was ultimately diagnosed as clear cell odontogenic carcinoma by the Department of Oral Pathology of Pusan National Dental University. Therefore, segmental mandibulectomy and bilateral neck dissection were performed, followed by reconstruction with fibula free flap and reconstruction plate. Concomitant chemotherapy radiotherapy was not necessary. The patient has been followed up, and no recurrence has occurred 6 months after surgery.
Keywords: Neoplasms, Ameloblastoma, Clear cell odontogenic carcinoma

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30 April 2019
Vol. 45
No. 2 pp. 49~120

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