Orthokeratienized odontogenic cyst (OOC) is a comparatively unusual developmental odontogenic cyst arising from odontogenic epithelium. Recurrence has rarely been noted, and has been reported in less than 2% of cases. Epidermoid cyst (EDC) is a benign cystic lesion, which is lined by stratified squamous epithelium and includes keratin debris. They can present anywhere in the body but are rare in the head and neck areas. In this report, we present an uncommon case of simultaneous occurrence of OOC in mandible and EDC around the areas of both ears in a patient who has no history of genetic syndrome.

• 김균태(경북대학교 치과대학 구강악안면외과학교실) | Kyoun-Tae Kim (Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyungpook National University)
• 권대근(경북대학교 치과대학 구강악안면외과학교실) | Tae-Geon Kwon (Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyungpook National University)
• 최소영(경북대학교 치과대학 구강악안면외과학교실) | So-Young Choi (Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyungpook National University) Correspondence