Congenital<unk>  is present from birth. Acquired<unk>  often has no clear cause but is frequently found together with other pulmonary diseases like asthma and Chronic obstructive pulmonary disease, as well as Gastroesophageal reflux disease.<unk>  can be caused by damage to the support cartilage or membranous wall of the trachea, this can be the result of physical trauma (such as from prolonged Tracheal intubation) or pathological changes caused by inflammatory diseases like Relapsing polychondritis. In patients with<unk>  in one study, the number of longitudinal elastic fibers in the pars of membranacea was reduced throughout the whole trachea. People with heritable connective tissue disorders like Ehlers–Danlos syndrome seem to have at an increased risk of both congenital and acquired<unk> , although the extent of that risk is unknown. There have been studies linking long-term use of inhaled Corticosteroids to<unk> .
Tracheobronchomalacia
Chronic obstructive pulmonary disease
Bronchomalacia
Bronchiectasis
Tracheomalacia
Lung cancer
Tracheal tumor
Asthma