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リツキシマブ関連のクリプトコッカス症による髄膜炎:症例報告
Sheyla Cadena1, Ricardo Bedón-Galarza2, Miguel Cachumba3
1Internal Medicine Department, Hospital General Docente de Calderón, Quito, 170521, Ecuador.
Medical mycology case reports
|February 3, 2026
まとめ
リツキシマブによる治療を受けた全身性エリテマトーデス(SLE)患者は、クリプトコッカス症による髄膜炎を発症する可能性がある。症状はSLEの再燃と類似することがあるため、免疫抑制状態にある患者では早期診断が極めて重要である。
科学分野:
- 免疫学
- 感染症
- 神経学
背景:
- 全身性エリテマトーデス(SLE)は慢性自己免疫疾患である。
- リツキシマブはSLEに使用される免疫抑制療法である。
- 免疫抑制は日和見感染症のリスクを高める。
研究 の 目的:
- リツキシマブ療法後のSLE患者におけるクリプトコッカス症による髄膜炎の症例を報告する。
- 感染症とSLE再燃との鑑別診断における課題を強調する。
- 免疫抑制状態にあるSLE患者における早期診断と治療の重要性を強調する。
主な方法:
- SLEの41歳女性の症例報告。
- クリプトコッカス症による髄膜炎の臨床像、診断検査、治療。
- リツキシマブ治療を受けているSLE患者における日和見感染症の文献レビュー。
主要な成果:
- 患者はリツキシマブ投与5ヶ月後にクリプトコッカス症による髄膜炎を発症した。
- 初期症状はSLEの再燃と誤認された。
- 腰椎穿刺により真菌性髄膜炎(クリプトコッカス・ネオフォルマンス)が確認された。
- アムホテリシンBとフルコナゾールによる治療により臨床的改善が得られた。
結論:
- クリプトコッカス症による髄膜炎は、SLE患者において疾患の再燃に類似した非典型的な症状を呈することがある。
- 免疫抑制状態にあるSLE患者で新たな神経学的症状を呈する場合、迅速な診断評価が不可欠である。
- 抗真菌薬による適時治療は、良好な転帰のために極めて重要である。
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