中耳炎を併発した巨大な側頭骨骨腫の1例

Giant Osteoma of the Temporal Bone with Otitis Media : a case study

I．はじめに

　頭蓋顔面に発生する骨腫の多くは副鼻腔にみられ，側頭骨に発生する骨腫の報告は比較的稀である．難聴，耳鳴，ときに中耳炎等を合併するため，多くが耳鼻科にて治療されているが，その周囲の構造を含めて理解しておく必要がある．今回，難治性の中耳炎のため手術が必要となり，全摘出し得た巨大な側頭骨骨腫の1例を経験したので，若干の文献的考察を加えて報告する．

A 71-year-old female presented with a giant osteoma of the right temporal bone and otitis media. Com-puted tomography (CT) and magnetic resonance imaging (MRI) confirmed the presence of the giant osteoma. An operation was performed to alleviate the difficult-to-treat otitis media and to address the re-lated cosmetic problem. During the operation, three-dimensional CT (3D-CT) was very helpful in under-standing the relationship between the tumor and the peripheral structures. Removal of the tumor improved the patient's otitis media. Osteoma of the temporal bone is rare. Only twenty-one cases of mastoid osteoma have been reported in Japan. In the present study, we review osteomas of the temporal bone and discuss their management.