Common origin of right subclavian, right common carotid and left subclavian arteries from aortic arch
SAH ?Vasospasm. CTA was performed.
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Variant aortic arch anatomy with the right subclavian, Right common carotid and left subclavian arteries arising from a common trunk.
ETT and NGT in-situ.
This is a rare variant of aortic arch anatomy with only two vessels arising from the arch - common origin of left and right subclavian arteries and right common carotid artery.
This case is different from the typical "aberrant left subclavian artery" which is the left subclavian artery arising as the fourth branch from a right-sided aortic arch (analogous to the aberrant right subclavian artery arising from a left-sided arch).