A case of mucocele with bone formation in the maxillary sinus

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  • OHNO Seiji
    Department of Oral and Maxillofacial Surgery, Kochi Medical School, Kochi University
  • SASA Kojirou
    Department of Oral and Maxillofacial Surgery, Kochi Medical School, Kochi University
  • TAKAHASHI Mayu
    Department of Oral and Maxillofacial Surgery, Kochi Medical School, Kochi University
  • KITAMURA Naoya
    Department of Oral and Maxillofacial Surgery, Kochi Medical School, Kochi University
  • YAMADA Tomohiro
    Department of Oral and Maxillofacial Surgery, Kochi Medical School, Kochi University
  • YAMAMOTO Tetsuya
    Department of Oral and Maxillofacial Surgery, Kochi Medical School, Kochi University

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Other Title
  • 上顎洞内に生じた骨増生を伴う粘液囊胞の1例
  • 上顎洞内に生じた骨増生を伴う粘液嚢胞の1例
  • ジョウガクドウ ナイ ニ ショウジタ ホネ ゾウセイ オ トモナウ ネンエキノウホウ ノ 1レイ

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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.

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