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要約 目的:原因不明の両眼の視神経炎に対して血漿交換療法が奏効した症例の報告。
症例:54歳女性が左眼の球後視神経炎を発症し,3日後に受診した。左眼視力は0.01であった。副腎皮質ステロイドのパルス療法が行われたが,光覚なしになった。その3か月後に右眼の視神経炎が発症した。左眼の経過からステロイド抵抗性であったので,血漿交換療法を行った。一過性の効果があったが,2週間後に再発し,光覚なしになった。再発の7週間後に開始した再度の血漿交換療法で,視力は1.0に改善した。以後プレドニゾロンと免疫抑制剤の内服を併用し,1年後の現在まで,良好な右眼視力を維持している。経過中に複数回行った抗AQP4抗体と抗MOG抗体は陰性であった。
結論:原因が特定できず,ステロイドに抵抗性のある視神経炎に,早期の血漿交換療法が奏効した。
Abstract Purpose: To report a case of idiopathic bilateral optic neuritis that responded to plasma exchange therapy.
Case: A 54-year-old female presented with retrobulbar neuritis in the left eye. Visual acuity was 0.01 when seen three days later. Left visual acuity decreased to no light perception 60 days after pulsed corticosteroid therapy. Acute retrobulbar neuritis developed in the right eye 3 months later. As the left eye proved to be resistant to steroid pulse therapy, she was treated by plasma exchange therapy. After the right visual acuity decreased to no light perception, another series of plasma exchange therapy was started 7 weeks after onset. Right visual acuity improved to 1.0. She has been receiving peroral prednisolone and immunosuppressive treatment. Visual acuity in the right eye has been maintained for one year until present. Repeated examinations for anti-AQP4 and anti-myelin oligodendrocyte glyprotein(MOG)have been consistently negative.
Conclusion: Early plasma exchange therapy was apparently effective in a case of corticosteroid-resistant acute retrobulbar neuritis of unknown etiology.
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