由类风湿因素引起的CA199的伪升高:一个案例报告和文献综述
Clinical laboratory
|August 8, 2025
概括
较高的CA199水平可能会被瘤因子 (RF) 干扰错误地增加. 像PEG沉和平台切换这样的方法证实了射频干扰,导致了精确的瘤标志物检测.
科学领域:
- 临床化学 临床化学
- 免疫学 免疫学 免疫学
- 实验室医学 实验室医学
背景情况:
- 癌症抗原19-9 (CA199) 的升高可能是由于干扰导致的错误阳性.
- 风湿性因子 (RF) 是一种自身抗体,可以干扰免疫学测试.
研究的目的:
- 为了调查和确认风湿因子 (RF) 干扰在一个错误升高CA199.9的患者.
- 评估检测和纠正瘤标志物测试中的射频干扰的方法.
主要方法:
- 化学发光免疫测试用于瘤标志物检测.
- 用聚乙烯糖醇 (PEG) 沉,连续稀释和平台切换来评估干扰.
- 不同免疫测试平台 (Abbott和Mindray) 之间的CA199结果的比较.
主要成果:
- PEG沉导致CA199水平显著下降 (179.62至17.66U/mL),表明干扰.
- 序列稀释中的非线性结果进一步支持了干扰的存在.
- 平台切换显示了CA199测量的实质差异 (179.62U/mL与18.68U/mL).
结论:
- 类风湿因子 (RF) 是一种IgG抗体,可以干扰免疫学测试,包括CA199.
- 高射频水平需要考虑对免疫学测试结果的潜在干扰.
- 诸如稀释,化/回收测试,平台切换和相关测试的交叉验证等技术对于验证干扰和确保准确性至关重要.
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