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Updated: May 7, 2026

Visualization of Amyloid β Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry
Published on: March 7, 2019
Cerebral amyloid angiopathy-related inflammation: an emerging disease
M Savoiardo1, A Erbetta, J C Di Francesco
1Department of Neuroradiology, IRCCS Foundation C. Besta Neurological Institute; Milan, Italy - msavoiardo@istituto-besta.it.
Abstract:
Three elderly patients with, respectively: mild cognitive impairment, severe and progressive neurologic involvement, and focal neurologic deficit, were observed. MRI showed multiple areas of white matter edema, at times partially involving the cortex, in the first two patients, and a single area in the third. Treatment with steroids determined the disappearance of the lesions and clinical amelioration. The key to the diagnosis of cerebral amyloid angiopathy-related inflammation (CAA-ri) was the demonstration, with appropriate MRI sequences, of microbleeds consistent with cerebral amyloid angiopathy (CAA). This diagnosis was supported by genetic analysis of APOE with demonstration of ε4/ε4 genotype, found in about 80% of CAA patients who develop inflammatory changes. In the appropriate clinical setting, MRI demonstration of microbleeds supported by results of genetic analysis of APOE may strongly support the diagnosis of CAA-ri thus avoiding cerebral biopsy.
Insights
Cerebral amyloid angiopathy-related inflammation (CAA-ri) was diagnosed in three elderly patients using MRI to detect microbleeds and APOE genotyping. Steroid treatment led to lesion disappearance and clinical improvement, suggesting a non-invasive diagnostic approach.
Area of Science:
- Neurology
- Radiology
- Genetics
Background:
- Cerebral amyloid angiopathy-related inflammation (CAA-ri) presents diagnostic challenges.
- Early diagnosis is crucial for effective management.
Purpose of the Study:
- To evaluate the utility of MRI and APOE genotyping in diagnosing CAA-ri.
- To assess the efficacy of steroid treatment for CAA-ri.
Main Methods:
- Case observation of three elderly patients with neurological deficits.
- Magnetic Resonance Imaging (MRI) to identify white matter edema and microbleeds.
- Genetic analysis of APOE genotypes.
Main Results:
- MRI revealed white matter edema and microbleeds consistent with cerebral amyloid angiopathy (CAA).
- Genetic analysis showed APOE ε4/ε4 genotype in patients with inflammatory changes.
- Steroid treatment resulted in complete lesion resolution and clinical improvement.
Conclusions:
- MRI-detected microbleeds, supported by APOE ε4/ε4 genotyping, strongly suggest CAA-ri.
- This approach may obviate the need for invasive cerebral biopsy.
- Steroids are an effective treatment for CAA-ri.
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