Absence of the right common carotid artery |
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| Authors: | Alfonso Cerase Elisa Rubenni Rossana Tassi Maria Laura Stromillo Carlo Venturi |
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| Affiliation: | (1) Unit of Diagnostic and Therapeutic Neuroradiology, Departments of Neurosciences and of Services, Interdepartmental Center of Magnetic Resonance, Azienda Ospedaliera Universitaria Senese, Policlinico “Santa Maria alle Scotte”, Viale Mario Bracci, 16, 53100 Siena, Italy;(2) Section of Radiology, Department of Orthopedics, Radiology, and Otolaryngology, University of Siena, Policlinico “Santa Maria alle Scotte”, Siena, Italy;(3) Stroke Unit, Department of Neurosciences, Azienda Ospedaliera Universitaria Senese, Policlinico “Santa Maria alle Scotte”, Siena, Italy;(4) Department of Neurological and Behavioral Sciences, Interdepartmental Center of Magnetic Resonance, University of Siena, Policlinico “Santa Maria alle Scotte”, Siena, Italy |
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| Abstract: | ![]()
In a 33-year-old male patient with multiple sclerosis, brain magnetic resonance imaging incidentally showed a narrow right intracranial internal carotid artery. Gadolinium-enhanced magnetic resonance angiography showed absence of the right common carotid artery. Right external and internal carotid arteries arose separately from the ipsilateral innominate artery and subclavian artery, respectively. Color-Doppler ultrasound confirmed this finding. Embriologically, the case could be interpreted as the disappearance of the third aortic arch with persistence of the carotid duct connecting the third and fourth aortic arches. |
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