Describe the three features of an aberrant right subclavian artery. Identify the following structures. What arch variant is most likely to be clinically significant? What are the branches of the descending thoracic aorta? What disease process commonly involves the area of the sinotubular junction and coronary sinuses? What is the most common arch variant? What is the name of the transition area from the coronary sinuses to the tubular portion of the ascending aorta? What is the second most common arch variant? What percentage of people have variant aortic arch anatomy? What structural feature is present at the root of the aorta? Book traversal links for Thorax ‹ Why is CTA or MRA performed in the evaluation of potential renal donors? Up Describe the three features of an aberrant right subclavian artery. ›