Fig. 1

a Preoperative CT reveals a 34 mm × 20 mm partial solid nodule at the right S3. b The anterior view of the 3D CT image shows the right-sided aortic arch with the aberrant left subclavian artery. c The posterior view of the 3D CT image shows the Kommerell diverticulum of the left subclavian artery. RSA, right subclavian artery; RCCA, right common carotid artery; LSA, left subclavian artery; LCCA, left common carotid artery; KD, Kommerell diverticulum