Rare association of tracheal diverticulum with pulmonary artery sling and aberrant right subclavian artery.

Tracheal diverticulum is a rarely encountered entity characterized by single or multiple invaginations of the tracheal wall. Two types of tracheal diverticula exist: congenital and acquired. We report a case of a pulmonary artery sling with an aberrant right subclavian artery associated with tracheal diverticulum.