Congenital absence of the internal carotid artery with intercavernous anastomosis
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Updated: Jan 23, 2026

Adult Mouse Venous Hypertension Model: Common Carotid Artery to External Jugular Vein Anastomosis.
Published on: January 27, 2015
Jesse Chen1, Mark Raden1, Cheryl Lin1
1Department of Radiology, Staten Island University Hospital, 475 Seaview Ave, Staten Island, NY 10305, USA.
Abstract:
Congenitally absent internal carotid artery with intercavernous anastomosis is an exceedingly rare vascular anomaly. We report such a case in a 65-year-old man with chronic symptoms resembling sporadic transient ischemic attacks. While these patients are usually asymptomatic due to compensatory collateralization, they are at increased risk of aneurysm formation, and thus proper identification is important. This report serves as both a case of a very rare anomaly and as a lesson on how to avoid this misdiagnosis by carotid duplex sonography. Additionally, we review the limited number of published cases of congenitally absent internal carotid artery with intercavernous anastomosis.
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