The article includes a CT scan of the right aortic arch with an aberrant left subclavian artery of a 53-year-old man and is explained and analyzed. The article states that Approximately 0.1% of population has a right sided aortic arch, and about half of these have an aberrant left subclavian artery which may arise either directly from the aorta or from the Kommerell's diverticulum. And any symptoms, which result from an aberrant left subclavian artery, are associated with compression of the esophagus or trachea and are most likely to occur if its origin is dilated.2.3