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Mycobacterium avium complex を原因とする横断的心膜洞感染症:症例報告
Ting Li1, Qi Wang1, Yuying Lin1
1Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China.
IDCases
|January 26, 2026
まとめ
過去の心臓手術歴のある患者において、横断的心膜洞における非結核性抗酸菌(NTM)感染症のまれな症例が特定された。メタゲノムシーケンシングによりMycobacterium avium complex(MAC)感染症が確認され、抗マイコバクテリア療法で成功裏に治療された。
科学分野:
- 感染症
- 心臓病学
- ゲノミクス
背景:
- 非結核性抗酸菌(NTM)は日和見病原体であるが、心臓疾患をまれに引き起こす。
- 横断的心膜洞はNTM感染症の異常な部位であり、事前の報告は限られている。
研究 の 目的:
- 横断的心膜洞におけるMycobacterium avium complex(MAC)感染症のまれな症例を報告する。
- まれなNTM感染症におけるメタゲノム次世代シーケンシング(mNGS)および外科的介入の診断的有用性を強調する。
主な方法:
- 心臓手術後の再発熱を呈した68歳男性の症例報告。
- 病変同定のための陽電子放出断層撮影/コンピューテッドトモグラフィー(PET/CT)。
- 病原体同定のための心膜病変の外科的切除、組織病理検査、およびmNGS。
- 抗マイコバクテリア療法および連続画像検査による7ヶ月の追跡調査。
主要な成果:
- 横断的心膜洞に高集積性の腫瘤様病変が認められた。
- 組織病理検査により肉芽腫性炎症および抗酸菌が明らかになった。
- mNGSにより組織サンプルからMACが同定された。
- 患者は抗マイコバクテリア療法に反応し、再発は認められなかった。
結論:
- 心臓手術歴のある患者で説明のつかない心膜/縦隔病変を呈する場合、NTM感染症、特にMACを考慮すべきである。
- 外科的介入およびmNGSは、これらのまれな心臓NTM感染症の診断および管理に有用なツールである。
- 早期診断および適切な抗マイコバクテリア療法は、良好な転帰のために不可欠である。
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