ArticleNeurology2026
Spatiotemporal Associations Between Cortical Microinfarcts and Cortical Superficial Siderosis in Cerebral Amyloid Angiopathy.
Article in Neurology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Distinct characteristics and risk factors of symptomatic and incidental DWI lesions in cerebral amyloid angiopathy.Journal of neurology · 2026Article
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11 authors.
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Abstract
BACKGROUND AND
objectivesCerebral amyloid angiopathy (CAA) is a small vessel disease characterized by hemorrhagic and nonhemorrhagic brain injuries. While cortical cerebral microinfarcts (CMI) have been associated with cortical superficial siderosis (cSS), the mechanisms linking these lesions remain unknown. This study aims to determine the spatiotemporal relationship between cortical CMI and cSS in CAA, with the hypothesis that cSS can promote local ischemic injury.
methodsPatients with probable CAA (Boston Criteria v2.0) without previous symptomatic intracerebral hemorrhage or CAA-related inflammation were recruited from a prospective memory clinic-based cohort at Massachusetts General Hospital. CAA-related radiologic manifestations-including cortical CMI and cSS-were quantified at baseline and at the 24-month follow-up on 3-Tesla MRI. Multivariable logistic regression and generalized linear models were applied to assess associations between baseline radiologic features and radiologic progression. We also compared the local density of cortical CMIs in regions with and without overlaid cSS.
resultsAmong 74 patients with probable CAA (age: 73.0 [67.9-78.2] years; 38% female), 26 (35%) had cortical CMIs (n = 135, 39% underlying cSS). Compared with CMI-negative CAA, those with CMI had a higher cSS prevalence (73% vs 40%; DISCUSSION: Our findings demonstrate a close interplay between cortical CMI and cSS, with the spatiotemporal relationship supporting the hypothesis that convexity subarachnoid hemorrhage, and potentially resultant cSS, may trigger local ischemic injury. Given the sample size of the longitudinal cohort, we consider these data hypothesis-generating. Further studies should confirm this association and identify the driving pathophysiology, which may represent a new therapeutic target for preventing cSS-associated cortical injury.
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