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Preoperative computed tomography scans. (A) Kommerell's diverticulum (black arrow) originated from isthmic portion of the right aortic arch. (B) 3-Dimensional image of trachea shows tracheal stenosis above carina. (C) Anterior view of the aortic arch and branches shows a mirror-image branching pattern. (D) Posterior view of aortic arch shows Kommerell' diverticulum (white arrow) at aortic isthmus.
