在假阳性脑粉样血管病变病例中,叶膜微出血的组织病理相关性
Valentina Perosa1, Corinne A Auger2, Maria Clara Zanon Zotin1,3
1J. Philip Kistler Stroke Research Center, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
Annals of neurology
|August 7, 2023
概括
动脉样硬化,而不是大脑粉样血管病变 (CAA),在一些患者中可能导致大脑叶膜微出血 (CMB). 确定CMB位置可能会改善CAA的生命诊断.
科学领域:
- 神经病理学神经病理学
- 神经辐射学神经辐射学
- 血管神经学 血管神经学
背景情况:
- 大脑粉样性血管病变 (CAA) 诊断依赖于病理学检查,在生命中的可能诊断是基于叶片大脑微型血流 (CMB) 等出血标记.
- 区分真正的CAA与模仿它的条件对于准确的临床管理至关重要.
研究的目的:
- 在被错误地诊断为可能患有CAA的个体中,调查叶CMB的组织病理基础.
- 为了确定这些病例中CMB的基础是动脉样硬化,而不是粉样β沉积.
主要方法:
- 对3名可能患有CAA但缺乏CAA病理证据的患者的分析.
- 活体3T和7T核磁共振扫描 (MRI) 来计数叶膜CMBs,然后进行向组织采样和对已识别的CMBs进行基因病理学检查.
- 序列切割和详细的显微镜分析以确定CMB和相关的血管病理.
主要成果:
- 在检查的脑组织中没有发现CAA的证据.
- 在9个采样的CMB中,有7个在组织病理学上得到证实.
- 与这些已确认的CMB相关的血管表现出中度至严重的动脉样硬化,而不是粉样质沉积.
- 在这些假阳性病例中,CMBs主要位于皮层下或皮层下白质中.
结论:
- 动脉样硬化是形成叶膜CMB的重要因素,特别是在被误诊为可能的CAA的情况下.
- 精确地定位CMBs,特别是与皮质带相关的,可能会提高生命中CAA诊断的准确性.
- 这项研究强调了考虑动脉样硬化变化的重要性,以便在分化诊断上对叶膜CMB进行诊断.
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