在现实临床实践中ANCA测试:西班牙队列中的诊断性能和预测价值
Jose Loureiro-Amigo1, Jaume Mestre-Torres1,2, Ana Marín-Sánchez3
1Systemic Autoimmune Diseases Unit, Internal Medicine Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
Rheumatology (Oxford, England)
|February 6, 2026
概括
反中性细胞体细胞体抗体 (ANCA) 间接免疫光检测显示了ANCA相关血管炎 (AAV) 的高诊断效率,特别是微观多炎 (MPA) 和多炎的颗粒炎 (GPA),具有非常高的负预测值.
科学领域:
- 免疫学 免疫学 免疫学
- 类风湿病学 类风湿病学
- 临床诊断 临床诊断 临床诊断
背景情况:
- 抗中性粒细胞体抗体 (ANCA) 是ANCA相关血管炎 (AAV) 的关键生物标志物,包括微观多炎 (MPA) 和多炎颗粒炎 (GPA).
- 间接免疫光 (IIF) 是ANCA检测的传统参考方法,但其现实世界的诊断实用性需要评估.
研究的目的:
- 在常规临床实践中评估间接免疫光 (IIF) 对抗中性粒细胞质抗体 (ANCA) 测试的诊断性能.
- 确定IIF在诊断ANCA相关性血管炎 (AAV),特别是微观多炎 (MPA) 和多炎粒状瘤 (GPA) 的有效性.
主要方法:
- 在三级医院四年来对5157名ANCA请求的患者进行了回顾性分析.
- 用化学发光免疫测试 (CLIA) 进一步测试IIF阳性血清对抗PR3和抗MPO抗体.
- 从电子医疗记录中提取了临床数据,测试指示和最终诊断.
主要成果:
- 在12.7%的患者中,IIF呈阳性;非典型ANCA (A-ANCA) 占68.8%,大部分是通过CLIA呈阴性.
- 在47名患者中诊断出ANCA相关的血管炎 (AAV),其中89.4%的IIF阳性.
- 对于GPA和MPA,IIF显示了93%的灵敏度和88%的特异性,具有99.9%的负预测值 (NPV) 和6.1%的正预测值 (PPV). 随着典型模式或CLIA结果的结合,特异性增加.
结论:
- ANCA IIF测试保持了显著的诊断效率和高的NPV,用于诊断GPA和MPA.
- IIF的低PPV,特别是非特异性症状,需要在临床实践中仔细解释.
- IIF仍然是一个有价值的工具,用于排除GPA和MPA的阴性,特别是在高前测试概率的患者中.
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