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New microbleed after blood-brain barrier leakage in intracerebral haemorrhage
Koen M van Nieuwenhuizen1, Jeroen Hendrikse2, Catharina J M Klijn1,3
1Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands.
Abstract:
Cerebral microbleeds are increasingly recognised as biomarkers of small vessel disease. Several preclinical and clinical studies have suggested that chronic disruption of the blood-brain barrier is one of the mechanisms for the development of cerebral microbleeds.A 51-year-old man experienced two left parieto-occipital lobar intracerebral haemorrhages (ICHs) in the timespan of 2 years. Multiple microbleeds surrounding the two haemorrhages were found on MRI, but not at location distant from the haemorrhages. Ten months after the last haemorrhage, an MRI demonstrated a right occipital focus of contrast enhancement. Twenty months after the last ICH, a new cerebral microbleed had developed exactly at the location of the earlier contrast enhancement.This case demonstrates that blood-brain barrier disruption may be an important factor preceding the development of cerebral microbleeds.
Insights
Cerebral microbleeds, indicators of small vessel disease, may develop after blood-brain barrier disruption. This case study links contrast enhancement, indicating BBB breakdown, to subsequent microbleed formation.
Area of Science:
- Neurology
- Neuroimaging
- Vascular Neurology
Background:
- Cerebral microbleeds (CMBs) are key indicators of small vessel disease.
- Chronic blood-brain barrier (BBB) disruption is a proposed mechanism for CMB development.
- Understanding CMB pathogenesis is crucial for managing cerebrovascular diseases.
Observation:
- A 51-year-old male presented with two lobar intracerebral hemorrhages (ICHs) within two years.
- MRI revealed multiple CMBs surrounding the ICHs, but not elsewhere.
- A contrast-enhancing lesion appeared in the right occipital lobe 10 months post-ICH.
Findings:
- A new CMB developed at the site of the prior contrast enhancement 20 months after the last ICH.
- This temporal and spatial correlation suggests a link between BBB disruption and CMB formation.
- CMBs were localized to hemorrhage sites, not distant areas.
Implications:
- This case provides direct evidence that BBB disruption can precede and potentially cause CMBs.
- Identifying BBB breakdown may offer new therapeutic targets for preventing CMBs.
- Further research into BBB integrity is warranted for small vessel disease management.
