セメント質骨性異形成症を合併した上下顎多発単純性骨囊胞の1例

• Published in: 日本口腔外科学会雑誌 Vol. 65; no. 10; pp. 667 - 671
• Main Authors: 吉村, 周作, 丹沢, 秀樹, 鵜澤, 一弘, 高原, 利和, 伊豫田, 学, 武内, 新
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 20.10.2019
• Subjects: セメント質骨性異形成症; 上顎骨; 下顎骨; 単純性骨囊胞; 多発性; 線維性骨病変
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.65.667

Simple bone cyst (SBC) is a lesion characterized by a bone cavity with a clear boundary without an epithelial lining. SBC often occurs in long bones, such as the humerus and femur, but is relatively rare in the maxillofacial regions. A 40-year-old woman was referred to our department because of a radiolucent region of the lower jaw observed on dental examination. In our department, X-ray examination revealed multiple cysts in the maxilla and mandible. Biopsy of one cyst of the left mandibular first molar region was indicated a diagnosis of SBC. Curettage of all cysts was performed in August 2017. Histopathological examination revealed no epithelial lining in the cyst. Moreover, the interior of the cystic cavity was hollow. A fibro-osseous lesion was found on the left maxillary cyst wall without an epithelial lining. It was finally diagnosed as an SBC with cemento-osseous dysplasia (COD). In recent years, simple bone cysts involving cemento-osseous dysplasia have been reported to recurrence. One year postoperatively, there has been no sign of recurrence, yet complete follow-up is imperative in the future.