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Neurological Surgery No Shinkei Geka Volume 21, Issue 2 （February 1993）

Neurological Surgery 脳神経外科 21巻2号（1993年2月発行）

Japanese English

症例

後頭骨Monostotic Fibrous Dysplasiaの1例 Monostotic Fibrous Dysplasia of The Occipital Bone 田島秀則 ¹ , 池田幸穂 ¹ , 安久津靖彦 ¹ , 山下陽一 ¹ , 水成隆之 ¹ , 中澤省三 ¹ Hidenori TAJIMA ¹ , Yukio IKEDA ¹ , Yasuhiko AKUTSU ¹ , Youichi YAMASHITA ¹ , Takayuki MIZUNARI ¹ , Shozo NAKAZAWA ¹ ¹日本医科大学脳神経外科 ¹Department of Neurosurgery Nippon Medical School キーワード： Fibrous dysplasia , Occipital bone , Monostosis Keyword: Fibrous dysplasia , Occipital bone , Monostosis pp.153-156

発行日 1993年2月10日 Published Date 1993/2/10

DOI https://doi.org/10.11477/mf.1436900602

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Abstract 文献概要
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I．はじめに

　fibrous dysplasia（線維性骨異形成）は骨髄の線維性結合組織による置換を主病因とし長管骨をはじめ全身の骨を侵す慢性内因性骨疾患である^7,10）．脳神経外科領域では顔面骨や頭蓋底の発生例は散見されるが後頭部は稀である^1,2）．今回われわれは後頭部腫瘤で発生した，後頭部monostotic fibrous dysplasia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 case of monostotic fibrous dysplasia of the occipital bone in a 18-year-old female is described. She was admit-ted to our hospital with a hard, painless mass (5 X 5cm) in the occipital region.

Neurological examination and laboratory data re-vealed no abnormalities. Skull x-rays showed a radio-lucent lesion with a sclerotic margin in the occipital bone. CT scan revealed an intradiploic multilocular mass sepa-rated by bone trabeculae. RI bone scan showed an abnor-mal uptake in this lesion.

T1 and T2 MR image showed an abnormal low-intensity lesion in the occipital region. Operation was performed to verify the nature of the le-sion, which was histologically confirmed to be an inac-tive fibrous dysplasia.

Postoperative course was uneventful. Although its occurrence in the occipital bone is uncommon, fibrous dysplasia should be considered in the differential diagno-sis of skull tumors.