“…In an autopsy study cited by Faucz et al ( 7 ) , 50% of cases of right aortic arch were associated with an aberrant left subclavian artery, which can be located behind the esophagus (in 80%), between the trachea and the esophagus (in 15%), or anterior to the trachea (in 5%). In some cases, right aortic arch is associated with a congenital heart defect ( 7 , 9 , 10 ) .…”