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Published on: April 23, 2021
Cerebral microbleeds: histopathological correlation of neuroimaging
A Shoamanesh1, C S Kwok, O Benavente
1Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, B.C., Canada. ashkan.sho@gmail.com
Background:
In recent years, there has been a growing interest in cerebral microbleeds (CMBs) and their role in cerebrovascular disease. A few studies have investigated the histopathological correlation between CMBs and neuroimaging findings. We conducted a systematic review in an attempt to characterize the pathological and radiological correlation.
Methods:
A systematic literature search was conducted for studies in which CMBs were characterized histopathologically and correlated with MRI findings.
Results:
Five studies met the inclusion criteria, with a total of 18 patients. Hemosiderin deposition was reported in 42 CMBs (49%), while 16 CMBs (19%) were described as old hematomas which stained for iron, 13 (15%) had no associated specific pathology, 11 (13%) contained intact erythrocytes, 1 (1%) was due to vascular pseudocalcification, 1 (1%) was a microaneurysm and 1 (1%) was a distended dissected vessel. Lipofibrohyalinosis was the most prominent associated vascular finding. Amyloid angiopathy was present primarily in patients with dementia.
Conclusions:
Although histopathological associations have been observed using MRI in patients with CMBs, the findings have yet to be validated and further research is warranted.
Insights
This systematic review explored cerebral microbleeds (CMBs) and their histopathological features. While MRI shows CMBs, direct pathological validation is still needed, highlighting the need for further research.
Area of Science:
- Neurology
- Pathology
- Radiology
Background:
- Cerebral microbleeds (CMBs) are increasingly studied in cerebrovascular disease.
- Histopathological correlation with neuroimaging findings of CMBs is an area of growing research interest.
Purpose of the Study:
- To systematically review and characterize the pathological and radiological correlation of cerebral microbleeds (CMBs).
Main Methods:
- A systematic literature search was performed.
- Studies correlating histopathological characterization of CMBs with MRI findings were included.
Main Results:
- Five studies with 18 patients were reviewed.
- Hemosiderin deposition was the most frequent finding (49%).
- Lipofibrohyalinosis was the most common associated vascular pathology; amyloid angiopathy was linked to dementia.
Conclusions:
- Histopathological associations with MRI findings in CMBs have been observed.
- Further research is warranted to validate these associations.
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