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原因不明の可逆性中枢性副腎皮質機能低下症:診断上の課題
Rim Masri1, Racha Farhat1, Hiba Jida1
1Endocrinology, Diabetes and Metabolism, Lebanese University Faculty of Medicine, Hadat, LBN.
Cureus
|December 25, 2025
まとめ
本研究は、原因となる誘因が特定できない、可逆性中枢性副腎皮質機能低下症(CAI)のまれな症例を報告する。治療により病状は改善し、CAIの慎重な診断と経過観察の重要性を強調している。
科学分野:
- 内分泌学
- 内科学
- 症例報告
背景:
- 可逆性中枢性副腎皮質機能低下症(CAI)は、副腎皮質刺激ホルモン(ACTH)の低下によるコルチゾール分泌の一時的な障害を伴うまれな疾患である。
- CAIは、グルココルチコイドの使用、病気、または薬剤に関連することが多いが、特発性に発生することもある。
- 特発性CAIは診断上の課題をもたらし、不必要な長期グルココルチコイド療法のリスクがある。
研究 の 目的:
- 原因となる誘因が特定できない一過性CAIの症例を提示する。
- 特発性CAIの診断および治療上の意義を強調する。
- CAIの慎重な評価と経過観察の重要性を強調する。
主な方法:
- CAIが疑われる45歳女性の症例報告。
- 早朝コルチゾールおよび血漿ACTHレベルを含む臨床検査。
- 下垂体MRIおよび他の下垂体ホルモンの評価。
- ヒドロコルチゾンによる治療およびその後のモニタリング。
主要な成果:
- 患者は早朝のコルチゾール値の低さ(1.3 µg/dL)とACTHの抑制(3.13 pg/mL)を示した。
- 下垂体MRIは特記すべき所見がなく、他の下垂体ホルモンは正常範囲内であった。
- ヒドロコルチゾン療法により症状は改善し、3か月以内にコルチゾール値は正常化した。
- 長期的な経過観察中に副腎機能の持続的な回復が観察された。
結論:
- 一過性CAIは、明らかな誘発因子がない特発性に発生する可能性がある。
- CAIの管理には、早期認識、適切な治療、および定期的な再評価が不可欠である。
- 特発性CAIを特定することで、誤診を防ぎ、不必要な生涯にわたるグルココルチコイド治療を回避できる。
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