Fatal intracranial arterial dissection: clinical pathological correlation

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.