上顎に発生し嚢胞状を呈した石灰化上皮性歯原性腫瘍の1例

• Published in: 日本口腔外科学会雑誌 Vol. 61; no. 4; pp. 246 - 250
• Main Authors: 軽部, 健史, 長谷川, 稔洋, 池内, 忍, 河奈, 裕正, 加藤, 伸, 高森, 康次
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 20.04.2015
• Subjects: 嚢胞型; 石灰化上皮性歯原性腫瘍
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.61.246

A calcifying epithelial odontogenic tumor (CEOT) is a relatively rare benign odontogenic tumor, which was described by Pindborg in 1958. According to the 2005 World Health Organization Classification of Odontogenic Tumors, cystic changes are not seen macroscopically in CEOT. We report a case of cystic variant of CEOT arising in the maxilla. The patient was a 19-year-old woman who had a swelling on the right side of the face, and she was referred to our department. The panoramic X-ray film showed a nearly circular radiolucent image in the upper right canine region with impacted teeth. Computed tomography revealed a nearly circular radiolucent soft tissue shadow, which was associated with impacted teeth and many calcified bodies. The subcutaneous soft tissue in the right cheek showed low signal intensity on T1-weighted images and high signal intensity on T2-weighted images on magnetic resonance imaging. We performed extraction and tumorectomy with the patient under general anesthesia, and the tumor appeared to be a cyst macroscopically. The histopathological diagnosis was cystic variant of CEOT. There have been no signs of recurrence during follow-up as of 1 year 6 months after surgery.