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Aberrant High-Riding Innominate Artery and Right Internal Carotid Artery in the Retropharyngeal Space
並列摘要
Introduction: Anatomic variations of the branching pattern of the aortic arch are well documented, however, a high-riding innominate artery (IA) or brachiocephalic artery ascending as far as the thyroid gland is an uncommon occurrence. Similarly, retropharyngeal transposition of the right cervical internal carotid artery (ICA) is a rare anatomic variant. We describe a case of a patient with an aberrant highriding IA and an aberrant retropharyngeal right cervical ICA. Case Report: A 63-year-old female who presented with a pulsatile anterior neck mass was referred for imaging. A neck contrastenhanced computed tomography (CECT) scan revealed an aberrant high-riding IA crossing anterior to the trachea just inferior to the thyroid gland. A retropharyngeal right cervical ICA was also found at the second vertebral body level. Conclusion: Although both of these variants are rare, they are of significance because they can cause fatal hemorrhage during neck surgical and anesthetic procedures if not recognised during imaging.