Background: An understanding of the variability of branches of aortic arch and associated anomaly impact in radiological
examination and surgery for diagnosis.
Objective: To present the retro esophageal right subclavian artery and theaortic origin of left vertebral artery associated with
right-sided thoracic duct and right non-recurrent laryngeal nerve.
Material and Method: The case study was carefully dissected to investigate the great vessels of the aortic arch and other
related variation structures.
Results: We found four anatomical variations in a 75-year-old Northeast Thai male cadaver. The four variations are composed of anomalies of the aortic origin of left vertebral artery, retro esophageal right subclavian artery, the right-sided thoracic duct and the right non-recurrent laryngeal nerve.
Conclusion: The finding of four variations in this case benefits for awareness during surgery in order to decrease the risk of iatrogenic injury.

Keywords: Aortic origin of left vertebral artery, Retroesophageal right subclavian artery, Right-sided thoracic duct, Right non- recurrent laryngeal nerve