Embolization from a fusiform middle cerebral artery aneurysm

Area of Science:

• Neurology
• Vascular Surgery
• Neuroradiology

Background:

• Intracranial aneurysms, particularly large or giant ones, are associated with neurological events.
• Transient ischemic attacks and completed strokes can result from intracranial aneurysms.

Observation:

• A case involving a 34-year-old man with a transient ischemic attack and subsequent stroke is presented.
• Arteriography revealed a large fusiform aneurysm of the left middle cerebral artery with intraluminal thrombus.
• Surgical exploration confirmed the presence of thrombus within the aneurysm lumen, though direct evidence of embolization was absent.

Findings:

• Embolization from intracranial aneurysms appears to be exclusive to large or giant aneurysms.
• Turbulent blood flow and stagnant zones within aneurysms likely contribute to thrombus formation.
• The study discusses the reasons for the relative rarity of embolization from these aneurysms.

Implications:

• Understanding the mechanisms of thrombus formation in aneurysms is crucial for stroke prevention.
• Four criteria are proposed to assess the likelihood of embolization from intracranial aneurysms.
• This research aids in determining when embolization is a probable cause of neurological deficits in patients with aneurysms.