上顎洞内に生じた骨増生を伴う粘液囊胞の1例

• Published in: 日本口腔外科学会雑誌 Vol. 61; no. 6; pp. 325 - 329
• Main Authors: 北村, 直也, 山田, 朋弘, 大野, 清二, 笹, 光治郎, 高橋, 真由, 山本, 哲也
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 20.06.2015
• Subjects: 上顎洞; 粘液囊胞; 骨増生
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.61.325

We report a case of mucocele with bone formation in the maxillary sinus. A man in his fifties was referred to our clinic because of a radiopaque lesion in the right maxillary sinus. Computed tomography showed a 25 × 18 mm soft tissue density lesion that was surrounded by thin bone in the right maxillary sinus. The clinical diagnosis was a cyst in the maxillary sinus, and the lesion was extirpated via the canine fossa with the patient under general anesthesia. The lesion was a cyst surrounded by thin bone and contained brown and mucinous fluid. Histopathologically, the cyst was lined by thin ciliated columnar epithelium, which was cytokeratin 8-positive. The surrounding bone had an irregular structure, and cancellous bone with a lamellar structure and fatty marrow was seen outside the surrounding bone. The histological diagnosis was a mucocele with bone formation. No recurrence has been observed during 2 years of follow-up.