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Updated: Jun 14, 2026
07:47
Longitudinal In Vivo Imaging of the Cerebrovasculature: Relevance to CNS Diseases
Published on: December 6, 2016
Cerebral Amyloid Angiopathy: Clinical Presentation, Sequelae and Neuroimaging Features-An Update
Stefan Weidauer1, Elke Hattingen1
1Institute of Neuroradiology, Goethe University, Schleusenweg 2-16, 60528 Frankfurt am Main, Germany.
Biomedicines
|March 28, 2025
Summary
Cerebral amyloid angiopathy (CAA) increases with age, often causing intracerebral hemorrhage and cognitive decline. Diagnosis relies on MRI and clinical findings, with biopsy confirming rare inflammatory variants.
Area of Science:
- Neurology
- Neuroradiology
- Pathology
Background:
- Cerebral amyloid angiopathy (CAA) prevalence rises with age, affecting over 50% of individuals over 80 with cognitive impairment.
- CAA commonly manifests as lobar intracerebral hemorrhage (ICH), recurrent neurological episodes, and cognitive decline, potentially progressing to Alzheimer's disease (AD).
- Neuroradiologic signs include microbleeds, subarachnoid hemorrhage, superficial siderosis, and non-hemorrhagic changes like dilated perivascular spaces and T2 hyperintensities on MRI.
Purpose of the Study:
- To provide a concise update on cerebral amyloid angiopathy (CAA) and its clinical consequences.
- To review diagnostic criteria and imaging findings for spontaneous CAA and autoantibody-related CAA-related inflammation (CAA-ri).
- To discuss management strategies for amyloid-related imaging abnormalities (ARIA) observed during amyloid antibody therapies.
Main Methods:
- Review of current literature on cerebral amyloid angiopathy (CAA).
- Analysis of neuroradiologic findings, including MRI characteristics of spontaneous CAA and CAA-related inflammation (CAA-ri).
- Evaluation of diagnostic criteria, such as the Boston criteria 2.0, and the role of biopsy.
Main Results:
- The Boston criteria 2.0, incorporating non-hemorrhagic MRI findings, enhance CAA diagnosis sensitivity and specificity.
- Autoantibody-related CAA-related inflammation (CAA-ri) presents with MRI findings similar to ARIA, including vasogenic edema (ARIA-E) and hemorrhagic lesions (ARIA-H).
- Approximately 20% of patients receiving monoclonal antibody therapy with ARIA on MRI experience clinical symptoms; mild ARIA cases may warrant continued treatment with monitoring.
Conclusions:
- Histological confirmation remains the gold standard for definitive CAA diagnosis.
- Clinical and MRI findings aid in diagnosing probable or possible CAA-ri, with biopsy as the definitive method.
- Management of ARIA in patients undergoing amyloid-targeting therapies involves careful monitoring, with continued treatment often recommended for mild cases.
Keywords:
Boston criteriaamyloid-related imaging abnormalitiesantibody treatmentcerebral amyloid angiopathyinflammationintracerebral hemorrhagemagnetic resonance imagingsequelaeMore Related Videos
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