Figure 2. Axial single-shot balanced gradient echo (True-FISP) MR images demonstrating: (a) the right-sided aortic arch with origin of the aberrant left subclavian artery from a diverticulum of Kommerell (arrow) located posterior to the oesophagus and trachea and (b) the descending thoracic aorta (arrow) to the right of the vertebral column. (c) Coronal True-FISP MR image shows the diverticulum of Kommerell (arrow) in relation to the right-sided aortic arch and descending aorta (arrowheads).