恶性贫血中掩盖的维生素B12缺乏症:由于测试干扰而导致的诊断陷 - 案例报告
Mohammed Abdulgayoom1, Elabbass Abdelmahmuod2, Abdulrahman F Al-Mashdali1
1Department of Haematology, National Center for Cancer Care and Research, Hamad Medical Corporation, Doha, Qatar.
SAGE open medical case reports
|September 18, 2025
概括
由于抗内在因子抗体导致虚假的维生素B12水平升高,可以掩盖巨细胞性贫血中真正的缺乏. 对患有恶性贫血和非典型实验室结果的患者来说,及时诊断和治疗至关重要.
科学领域:
- 血液学 血液学 血液学
- 临床化学 临床化学
背景情况:
- 巨细胞性贫血通常是由维生素B12或叶酸缺乏引起的.
- 反内在因子抗体的测试干扰可能导致错误的维生素B12水平升高,使诊断复杂化.
研究的目的:
- 要突出抗内在因子抗体介导干扰在维生素B12测试中的诊断挑战.
- 强调在患有巨细胞性贫血的患者中识别掩盖的维生素B12缺乏的重要性.
主要方法:
- 一个64岁的妇女患有宏细胞性贫血和泛细胞性贫血的病例报告.
- 实验室检查,包括血清维生素B12水平和抗体检测.
- 临床评估和对经验性维生素B12治疗的反应.
主要成果:
- 这位患者出现了宏细胞性贫血,泛细胞性贫血,以及显著增加的血清维生素B12 (>2000 pmol/L).
- 鉴定出一种强烈阳性的抗内在因子抗体标位,解释了矛盾的实验室发现.
- 亲肠道维生素B12治疗导致了快速的血液学恢复,证实了恶性贫血次要的蒙面维生素B12缺乏症.
结论:
- 反内在因子抗体可能会导致显著的测试干扰,掩盖真正的维生素B12缺乏.
- 临床医生必须考虑在患有巨细胞性贫血和实验室结果不一致的患者中进行掩盖的维生素B12缺乏症,特别是当存在抗内在因子抗体时.
- 保持高的怀疑指数对于准确诊断和有效管理恶性贫血至关重要.
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