Right sided aortic arch with Kommerell diverticulum
CT angiography for evaluation of cervical carotid stenosis.
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Right aortic arch and the aberrant origin of the left subclavian artery, which passes anterior to the esophagus, is dilated (Diverticulum of Kommerell).
A Kommerell diverticulum refers to the bulbous configuration of the origin of an aberrant left subclavian artery in the setting of a right-sided aortic arch. However, it was originally described as a diverticular outpouching at the origin of an aberrant right subclavian artery with a left-sided aortic arch.