Severe, diffuse tracheobronchomalacia (TBM) is an underrecognized cause of dyspnea, recurrent respiratory infections, cough, secretion retention, and even respiratory insufficiency
[ncbi.nlm.nih.gov]
Symptoms included severe dyspnea, dry cough, recurrent pulmonary infections, and respiratory failure.
[ncbi.nlm.nih.gov]
Symptoms can be severe with recurrent bronchopulmonary infections and cough-induced syncope.
[ncbi.nlm.nih.gov]