Three-dimensional CT angiography images. Relationships of right-sided aortic arch and its branches with trachea (*) and esophagus (#) in different directions (A-D). Left common carotid artery (a), right common carotid artery (b) and right subclavian artery (c), originated separately in said order. Left subclavian artery (d) separately arises from a Kommerell’s diverticulum (K). RAO indicates right anterior oblique; CAU, caudal.