<unk>  is a condition characterized by flaccidity of the tracheal support cartilage which leads to tracheal collapse especially when increased airflow is demanded.
Tracheomalacia
Laryngomalacia
Tracheal deviation
Bronchomalacia
Tracheoesophageal fistula
Bronchial atresia
Pachygyria
Tracheal diverticulum