Unilateral Agenesis of the Internal Carotid Artery: A Report of Two Rare Cases

  • Seyed Kamaledin Hadei Department of Radiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
  • Mahdi Ramezani Department of Anatomy, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
  • Reza Taherian Department of Radiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
Keywords: Cerebrovascular Insufficiency, Circle of Willis, Agenesis, Internal Carotid Artery

Abstract

Background: Internal carotid artery (ICA) agenesis occurs when one or both of the blood vessels that supply blood to the brain do not develop. Congenital agenesis of the ICA rarely occurs. It is usually asymptomatic but may sometimes associate with neurological symptoms such as migraine and pulsatile tinnitus. Moreover, differentiating it from occlusion of ICA is important in patients with stroke. Case Report: We report two cases (63-years-old man and 69-year-old woman) of asymptomatic unilateral ICA agenesis who were referred to our cardiovascular hospital for coronary artery bypass graft. Due to a suspicious history of transient ischemic attack, the patients underwent carotid ultrasonography. With findings suggestive of unilateral ICA agenesis at color Doppler, patients underwent computed tomography angiography that confirmed the diagnosis. Conclusion: Suspecting ICA agenesis at color Doppler imaging of the neck and differentiating it from occluded ICA at CT angiography is important for correct diagnosis and management of the patients.

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Published
2022-12-25
How to Cite
Hadei, S. K., Ramezani, M., & Taherian, R. (2022). Unilateral Agenesis of the Internal Carotid Artery: A Report of Two Rare Cases. Galen Medical Journal, 11, e2318. https://doi.org/10.31661/gmj.v11i.2318
Section
Case Report/Series