An adult case of Kommerell's diverticulum with a right-sided aortic arch.

The patient was a 56-year-old woman with Kommerell's diverticulum associated with a right-sided aortic arch with mirror-image branching. No other congenital heart anomalies or vascular rings were observed. Descending aortic replacement through a right posterolateral thoracotomy was performed to eliminate the risk of diverticular rupture. The patient's postoperative course was uneventful. This was a rare adult case of right-sided aortic arch with Kommerell's diverticulum associated with no other congenital heart disease.