Kommerell diverticulum with right-sided aortic arch with aberrant left subclavian artery

The right aortic arch with aberrant left subclavian artery is the most common cause of vascular ring and can be either asymptomatic or symptomatic owing to mass effect. Removal of Kommerell diverticulum and division of the ligamentum arteriosum through a left thoracotomy is currently advocated in symptomatic patients and patients with large diverticulum (>5 cm) to avoid inherent complications.