Aberrant right subclavian artery
Examination for evaluation of carotid stenosis on previous doppler.
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C+ arterial phase
Instead of being the first branch (with the right common carotid as the brachiocephalic artery), aberrant right subclavian artery (ARSA) arises on its own as the fourth branch, after the left subclavian artery. It then hooks back to reach the right side. Its relationship to the oesophagus is variable: