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要約 目的:前部虚血性視神経症が突発したBehçet病症例の報告。症例:53歳男性が7年前にBehçet病と診断され,アフタ性口内炎,結節性紅斑,外陰部潰瘍,副睾丸炎,両眼に虹彩毛様体炎があった。コルヒチンとプレドニゾロンを内服し,症状は軽快し,矯正視力は左右とも1.5であった。2か月前に肺炎と熱発を契機として掌蹠膿疱症が生じ,左眼矯正視力が0.01に低下した。所見と経過:左眼の視神経乳頭が発赤腫脹し,視野の狭窄があった。蛍光眼底造影で乳頭上方の低蛍光と脈絡膜充盈遅延があり,前部虚血性視神経症と診断した。副腎皮質ステロイドパルス療法ののち,アスピリンとシクロスポリンの内服を行った。発症から9か月後の現在,乳頭は蒼白化し,視力は0.3であり,下方の水平性視野欠損がある。結論:Behçet病で視力低下が突発した場合には,前部虚血性視神経症が原因である可能性がある。
Abstract. Purpose:To report a case of Behçet disease manifesting anterior ischemic optic neuropathy. Case:A 53-year-old male had been diagnosed with Behçet disease 7 years before. He had aphthous stomatitis,erythema nodosum,genital ulcer,and bilateral iridocyclitis. He had had corrected visual acuity of 1.5 in either eye. Clinical symptoms had improved following systemic colchicine and prednisolone. He developed pneumonia 2 months before,followed by pustulosis palmaris and plantaris. His left visual acuity decreased to 0.01. The left eye showed swollen optic disc and constricted visual field. Fluorescein angiography showed findings consistent with anterior ischemic optic neuropathy. He received pulsed corticosteroid therapy followed by peroral aspirin and cyclosporin. Nine months after the episode,the optic disc has become atrophic with visual acuity of 0.3 and horizontal hemianopia. Conclusion:Anterior ischemic optic neuropathy may be involved in Behçet disease with sudden visual disturbance.
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