A case with coincidence of aberrant right subclavian artery and common origin of the carotid arteries.

An aortic arch variant was found in a 63 year-old male cadaver during routine dissection. An aberrant right subclavian artery (ARSA) arose from the distal aortic arch after the left subclavian artery and coursed to the right and upward behind the trachea and esophagus. A common origin for the carotid arteries (COCA) accompanied this variant of the right subclavian artery.