Clinical Presentation

A child with episodic shortness of breath.

Further Work-up

(A) Frontal chest radiograph demonstrates clear lungs and a normal cardiac silhouette. However, there is a right-sided impression on the tracheal air column at the level of the aortic arch (arrow). (B,C) Lateral image from a barium esophagogram demonstrates a prominent, smooth posterior impression on the upper esophagus (arrow