<unk>  can best be described as a birth defect of the bronchus in the respiratory tract. Congenital malacia of the large airways is one of the few causes of irreversible airways obstruction in children, with symptoms varying from recurrent wheeze and recurrent lower airways infections to severe dyspnea and respiratory insufficiency. It may also be acquired later in life due to chronic or recurring inflammation resulting from infection or other airway disease.
Bronchomalacia
Tracheobronchomalacia
Malacia
Tracheomalacia
Tracheal tumor
Laryngomalacia
Bronchitis kettle
Croup