Bilateral asymptomatic extracranial carotid artery aneurysms

Area of Science:

• Vascular Surgery
• Cerebrovascular Diseases
• Arterial Aneurysms

Background:

• Extracranial carotid artery aneurysms are uncommon, representing a small fraction of all arterial aneurysms.
• Etiologies include atherosclerosis, fibromuscular dysplasia, trauma, infection, and congenital defects, with atherosclerosis being the most prevalent cause.
• These aneurysms most commonly occur at the common carotid artery bifurcation and proximal internal carotid artery (ICA).

Observation:

• Aneurysms typically present as a pulsatile parapharyngeal mass.
• They can lead to complications such as embolization, neurovascular compression, rupture, and ischemic events.
• Saccular aneurysms are common in the middle and distal ICA, while fusiform aneurysms occur at the bifurcation.

Findings:

• Atherosclerosis accounts for a significant majority (46-70%) of carotid artery aneurysms.
• Conservative management of extracranial internal carotid artery (ICA) aneurysms carries a high mortality rate of approximately 71%.
• Surgical treatment is generally indicated to avoid catastrophic outcomes.

Implications:

• Prompt surgical intervention is crucial for managing extracranial carotid artery aneurysms to prevent mortality and morbidity.
• Nonoperative management may be considered for specific cases in young patients, but surgical repair is necessary if conservative measures fail or symptoms progress.
• Understanding the causes, locations, and presentation of these aneurysms is vital for timely diagnosis and effective treatment planning.