Nonatherosclerotic pathology of the neck vessels: prevalence and flow patterns.

OBJECTIVES

To determine the prevalence and flow characteristics of nonatherosclerotic pathologies of the cervical vessels.

DESIGN

From 1997 to 2003, 11 480 ultrasound tests were performed for neck vessel evaluation on patients with cerebrovascular symptoms and trauma, and on asymptomatic patients with a bruit, cervical mass, or prior to aortocoronary bypass. When necessary, these findings were confirmed by other imaging modalities.

RESULTS

A total of 3010 repeated tests were excluded, leaving 8470 patients. The prevalence of nonatherosclerotic pathologies (n = 55) was 0.65%. The most common was thromboembolism (n = 19, 0.22%), followed by dissection (n = 16, 0.19%), carotid body tumors (n = 5, 0.06%), aneurysms (n = 4, 0.05%), fibromuscular dysplasia (n = 4, 0.05%), Takayasu's arteritis (n = 1, 0.01%), pseudoaneurysms (n = 5, 0.06%), and arteriovenous fistulae (n = 1, 0.01%). Cerebrovascular symptoms were present in 27 patients (49%).

CONCLUSION

Nonatherosclerotic pathology accounts for 0.65% of patients referred for neck vessel evaluation. About half of them are symptomatic. Diagnosis of these pathologies and knowledge of their flow characteristics is important for patient management.