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Fatal intracranial arterial dissection: clinical pathological correlation
Insights
Fatal arterial dissection in brain arteries often presents with stroke symptoms. Pathological findings reveal dissections between the internal elastic lamina and media, with thrombosis in anterior circulation and transmural dissections in posterior circulation.
Area of Science:
- Neurology
- Pathology
- Vascular Biology
Background:
- Intracranial arterial dissection is a critical cause of stroke, particularly in younger individuals.
- Understanding its clinical and pathological features is essential for diagnosis and management.
Observation:
- Three patients with anterior circulation dissections exhibited focal ischemic neurological deficits.
- Pathological examination showed dissections between the internal elastic lamina and media with intravascular thrombosis.
- Three of four patients with posterior circulation dissections presented with subarachnoid hemorrhage and transmural dissections.
Findings:
- Distinct pathological patterns differentiate anterior (laminar dissection with thrombosis) and posterior (transmural dissection) circulation dissections.
- No primary vasculopathies (degenerative or inflammatory) were identified in the affected intracranial vessels.
- Clinical presentations correlate with specific pathological abnormalities.
Implications:
- These findings refine the understanding of intracranial arterial dissection pathogenesis.
- Distinguishing between anterior and posterior circulation dissection pathologies may aid in clinical diagnosis and treatment strategies.
- Further research into the specific mechanisms underlying these dissections is warranted.
Abstract:
The clinical pathological features of fatal arterial dissection confined to the intracranial vessels are described. Three patients with anterior circulation dissections presented with focal ischaemic neurological deficits and pathological examination of involved vessels revealed a dissection plane between internal elastic lamina and media accompanied by intravascular thrombosis. Three of four patients with posterior circulation dissections had clinical pathological features of subarachnoid haemorrhage and at necropsy had transmural dissections. In contrast to previous reports, primary vasculopathies either degenerative or inflammatory were not identified in affected vessels. The pathogenesis of intracranial arterial dissection is discussed and the clinical features are correlated with the pathological abnormalities.