Main Article Content
Abstract
ICA (Internal Carotid Artery) agenesis is a rare vascular anomaly, often associated with compensatory collateral circulation and predisposition to aneurysm formation. We report the case of a 60-year-old female presenting with acute SAH (Subarachnoid Haemorrhage), intraparenchymal haemorrhage, and intraventricular extension, secondary to ruptured aneurysms. Imaging revealed right ICA agenesis, a fusiform basilar aneurysm, and a saccular aneurysm in the left anterior cerebral artery. Endovascular coiling successfully stabilized the patient. This case highlights the importance of multimodal imaging and early intervention in managing rare cerebrovascular anomalies.
ICA agenesis is an exceedingly rare congenital vascular anomaly with a prevalence of <0.01%.[1] It is often asymptomatic but can lead to significant cerebrovascular complications due to altered hemodynamics and compensatory collateral circulation. We report a rare case of right ICA agenesis complicated by ruptured aneurysms, emphasizing the role of advanced imaging modalities in diagnosis and management.
Article Details

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
References
- Cinar C, Oran I, Bozkaya H. Agenesis of the internal carotid artery associated with intracranial aneurysm. Journal of Neurosurg 2011;114(2):496-9.
- de la Monte SM, Wands JR. Aneurysmal subarachnoid hemorrhage associated with ICA agenesis. J Neurol 2010;257(6):1000-4.
- Stehbens WE. Pathogenesis of cerebral aneurysms and associated anomalies. Pathology Annual 2012;7(2):337-47.
References
Cinar C, Oran I, Bozkaya H. Agenesis of the internal carotid artery associated with intracranial aneurysm. Journal of Neurosurg 2011;114(2):496-9.
de la Monte SM, Wands JR. Aneurysmal subarachnoid hemorrhage associated with ICA agenesis. J Neurol 2010;257(6):1000-4.
Stehbens WE. Pathogenesis of cerebral aneurysms and associated anomalies. Pathology Annual 2012;7(2):337-47.