<unk>  is a term for weak cartilage in the walls of the bronchial tubes, often occurring in children under a day.<unk>  means 'floppiness' of some part of the bronchi. Patients present with noisy breathing and/or wheezing. There is collapse of a main stem bronchus on exhalation. If the trachea is also involved the term tracheobronchomalacia (TBM) is used. If only the upper airway the trachea is involved it is called tracheomalacia (TM). There are two types of<unk> . Primary<unk>  is due to a deficiency in the cartilaginous rings. Secondary<unk>  may occur by extrinsic compression from an enlarged vessel, a vascular ring or a bronchogenic cyst. Though uncommon, idiopathic (of unknown cause) tracheobronchomalacia has been described in older adults.
Bronchomalacia
Tracheobronchomalacia
Malacia
Tracheomalacia
Tracheal tumor
Laryngomalacia
Bronchitis kettle
Croup