Congenital segmental absence of tracheal rings

Case 1: Bronchogram demonstrating kinked trachea.

Case 1: MLB image demonstrating collapsed proximal trachea.

Case 1: MLB image proximal to carina.

Case 1: MLB image demonstrating trifurcation of trachea.

Case 2: Lateral inspiratory bronchogram prior to stent insertion, demonstrating anteroposterior tracheal collapse.

Case 2: Lateral expiratory bronchogram prior to stent insertion.

Case 2: Lateral bronchogram following insertion of tracheal metal stent.