Abstract
Congenital unilateral agenesis of the internal carotid artery (ICA) is a rare anomaly. Due to proper sufficient collateral circulation via the circle of Willis most cases are asymptomatic, but patients can also present with ischemic or hemorrhagic cerebrovascular insults. The absence of the bony carotid canal is essential to differentiate this anomaly from chronic ICA occlusion. Awareness of this situation by clinicians and radiologists is essential because these patients have an increased incidence of various intracranial pathologies. We report two cases of this rare developmental congenital abnormality occurring in two young patients and describe the presentation, diagnosis, determined developmental causes, imaging findings, and complications.
Highlights
CASE REPORTAysegul Sagir Kahraman*, Bayram Kahraman†, Zeynep Maras Ozdemir*, Metin Dogan*, Mehmet Kaya†, Cemile Ayse Gormeli* and Mehmet Akif Durak‡
The anomalies of the internal carotid artery (ICA) related to developmental defects can be categorized as follows: agenesis; aplasia; or hypoplasia [4]
Most cases of ICA agenesis are asymptomatic due to sufficient collateral circulation and it is usually an incidental finding on head and the neck imaging by color Doppler ultrasonography, computed tomography (CT), or magnetic resonance imaging (MRI)
Summary
Aysegul Sagir Kahraman*, Bayram Kahraman†, Zeynep Maras Ozdemir*, Metin Dogan*, Mehmet Kaya†, Cemile Ayse Gormeli* and Mehmet Akif Durak‡. Congenital unilateral agenesis of the internal carotid artery (ICA) is a rare anomaly. Due to proper sufficient collateral circulation via the circle of Willis most cases are asymptomatic, but patients can present with ischemic or hemorrhagic cerebrovascular insults. The absence of the bony carotid canal is essential to differentiate this anomaly from chronic ICA occlusion. Awareness of this situation by clinicians and radiologists is essential because these patients have an increased incidence of various intracranial pathologies. We report two cases of this rare developmental congenital abnormality occurring in two young patients and describe the presentation, diagnosis, determined developmental causes, imaging findings, and complications
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