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- Abstract 文献概要
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Ⅰ.はじめに
Isolated angiitis of CNS(以下IAC)は免疫学的機序に基づいた中枢神経の小,中血管を選択的に侵す血管炎である.IACは当初,脳梗塞を頻回に起こし予後不良とされていたが,ステロイドや免疫抑制剤に良好な反応を示すことが判明してきた.今回われわれは頭痛にて発症し,経過中著明な血管狭窄を認めたIACの1例を経験し,その経時的変化を詳細に追跡したので報告する.
Isolated angiitis of the central nervous system (IAC) is a disease of unknown etiology,and is restricted to the small-to-medium-sized blood vessels of the central nervous system. We report serial MR angiography findings in a case of IAC.
A 51-year-old female came to our hospital because of severe headache. Computed tomography (CT) 6 days after the onset didn’t show anything particular,and MR angiography 8 days after the onset revealed segmental stenosis of the bilateral anterior cerebral arteries. However,we couldn’t diagnose it as IAC. Thirteen days after the onset,the patient's headache worsened. Subsequent MRA revealed severe stenosis of the bilateral anterior and middle cerebral arteries. After that,steroid therapy was initiated. Her headache was disappeared immediately. Twenty-nine days after the onset,MRA showed the improvement of stenosis. Seventy-three days after the onset,stenosis of the cerebral arteries was disappeared.
Interestingly,in another case report of IAC,MRA showed improvement of the stenosis one month after the onset,and disappearance of the stenosis two months after the onset.

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