SynthesisEuropean stroke journal2026
Cerebral amyloid angiopathy and amyloid load distribution detected on amyloid-positron emission tomography: A systematic review and meta-analysis.
Synthesis in European stroke journal, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionThere are limited data regarding the amyloid positron emission tomography (PET) imaging among patients with Cerebral Amyloid Angiopathy (CAA). We sought to assess the amyloid load distribution detected on amyloid-PET among CAA patients compared to patients with Alzheimer's Disease (AD), patients with hypertension (HTN) related hemorrhage (ICH) and healthy controls (HC). PATIENTS AND
methodsA systematic review and meta-analysis of published studies with available data on global and regional amyloid-PET uptake was conducted. Comparisons with respect to amyloid load distribution were investigated using random-effects models based on the ratio of mean (RoM) amyloid-PET uptake. RoM < 1 and RoM > 1 indicate lower and higher global or regional amyloid-PET uptake in CAA compared to another population, respectively.
resultsWe identified 16 cohorts, comprising 271 CAA patients (mean age: 72 years; women: 46%) versus 130 AD patients (mean age: 73 years; women: 44%), 180 patients with HTN-related ICH (mean age: 66 years; women: 36%) and 61 HC (mean age: 71 years; women: 46%) with available data on amyloid-PET. Global amyloid PET ratio differentiated CAA from AD [RoM: 0.93; 95% CI: 0.90-0.96; p < 0.0001], HTN-related ICH [RoM: 1.25; 95% CI: 1.20-1.31; p < 0.0001], and HC [RoM: 1.26; 95% CI: 1.23-1.29; p < 0.0001]. Occipital amyloid-PET uptake [RoM: 1.20; 95% CI: 1.15-1.26; p < 0.0001] was higher in CAA compared to HTN-related ICH, and Occipital-to-global [RoM: 1.05; 95% CI: 1.03-1.07; p < 0.0001] ratio of amyloid-PET uptake differentiated also CAA from AD.
conclusionsCAA is characterized by a distinct amyloid-PET burden and distribution compared to AD patients, patients with HTN-related ICH and HC. These findings may contribute to the design and conduct of future randomized controlled clinical trials, aiming to treat CAA at preclinical stages.
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