Diagnostic value of lobar microbleeds in individuals without intracerebral hemorrhage
- PMID: 26079413
- PMCID: PMC4677060
- DOI: 10.1016/j.jalz.2015.04.009
Diagnostic value of lobar microbleeds in individuals without intracerebral hemorrhage
Abstract
Introduction: The Boston criteria are the basis for a noninvasive diagnosis of cerebral amyloid angiopathy (CAA) in the setting of lobar intracerebral hemorrhage (ICH). We assessed the accuracy of these criteria in individuals with lobar microbleeds (MBs) without ICH.
Methods: We identified individuals aged >55 years having brain magnetic resonance imaging (MRI) and pathological assessment of CAA in a single academic hospital and a community-based population (Framingham Heart Study [FHS]). We determined the positive predictive value (PPV) of the Boston criteria for CAA in both cohorts, using lobar MBs as the only hemorrhagic lesion to fulfill the criteria.
Results: We included 102 individuals: 55 from the hospital-based cohort and 47 from FHS (mean age at MRI 74.7 ± 8.5 and 83.4 ± 10.9 years; CAA prevalence 60% and 46.8%; cases with any lobar MB 49% and 21.3%; and cases with ≥2 strictly lobar MBs 29.1% and 8.5%, respectively). PPV of "probable CAA" (≥2 strictly lobar MBs) was 87.5% (95% confidence interval [CI], 60.4-97.8) and 25% (95% CI, 13.2-78) in hospital and general populations, respectively.
Discussion: Strictly lobar MBs strongly predict CAA in non-ICH individuals when found in a hospital context. However, their diagnostic accuracy in the general population appears limited.
Keywords: Boston criteria; Cerebral amyloid angiopathy; Intracerebral hemorrhage; Likelihood ratio; Microbleed; Predictive value; Sensitivity; Specificity.
Copyright © 2015 The Alzheimer's Association. Published by Elsevier Inc. All rights reserved.
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Comment in
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Establishing the "meaning" of microbleeds: Clinical context or lobar microbleed burden?Alzheimers Dement. 2016 Jan;12(1):85-6. doi: 10.1016/j.jalz.2015.09.004. Epub 2015 Oct 26. Alzheimers Dement. 2016. PMID: 26515762 No abstract available.
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