Question: What causes Tracheobronchomalacia ?
Answer: What causes tracheobronchomalacia? The underlying cause of tracheobronchomalacia (TBM) varies by subtype. Most cases of primary TBM (also called congenital TBM) are caused by genetic conditions that weaken the walls of the airway (specifically the trachea and bronchi). For example, TBM has been reported in people with mucopolysaccharidoses (such as Hunter syndrome and Hurler syndrome), Ehlers-Danlos Syndrome, and a variety of chromosome abnormalities. Primary TBM can also be idiopathic (unknown cause) or associated with prematurity and certain birth defects (i.e. tracheoesophageal fistula). The secondary form (also called acquired TBM) is caused by the degeneration (break down) of cartilage that typically supports the airways. It is most commonly associated with: Certain medical procedures such as endotracheal intubation or tracheostomy Conditions that lead to chronic (persisting or progressing for a long period of time) inflammation such as relapsing polychondritis or chronic obstructive pulmonary disease (COPD) Cancers, tumors, or cysts that cause prolonged compression of the airway
Source: GARD

Question: What are the treatments for Tracheobronchomalacia ?
Answer: How might tracheobronchomalacia be treated? Treatment is only medically necessary in people who have signs and symptoms of tracheobronchomalacia (TBM). Management of symptomatic TBM first involves identifying underlying conditions contributing to symptoms, such as chronic inflammation, compression, or injury. Initial treatment will target these underlying medical concerns. If symptoms persist, people with TBM may undergo pulmonary function tests or other assessments to help guide therapy choice and allow monitoring of the response to treatment. Treatment options may include: Silicone and/or long-term stenting Surgical correction Continuous positive airway pressure (CPAP) Tracheostomy (often used as a last resort as it can sometimes worsen TBM) We strongly recommend that you discuss your treatment options with a healthcare provider.
Source: GARD