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Ⅰ.はじめに
良性頭蓋内圧亢進症(benign intracranial hyper-tension;BIH)は,頭蓋内圧亢進症状があるにもかかわらず頭蓋内占拠性病変を認めず,一般に良好な経過をたどる疾患群とされる.しかし,視力障害等が後遺症として残る場合もあり,必ずしも良性とは言い切れない2).今回われわれは,副腎皮質ステロイド長期服用後の減量中に発症し,視力障害を来した良性頭蓋内圧亢進症の1例を経験した.BIHの原因は多様性に富むが,副腎皮質ステロイド減量が原因と考えられる報告は,検索し得た限りでは,9例しかないため,若干の文献的考察を加え報告する.
We report a case of benign intracranial hypertension (BIH) resulting from corticosteroid withdrawal. A 36-year-old woman was admitted to hospital because of an intractable headache. A neurological examination on admission showed no abnormalities other than a headache and nausea. CT, MRI, and angiogram examinations showed no abnor-malities. Hematological and laboratory data were also normal. Continuous monitoring of her cerebrospinal fluid (CSF) pressure showed a value of over 25 mmHg during sleep, but papilledema was not observed. A diagnosis of BIH was made, with corticosteroid withdrawal considered to be the most probable cause.
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