Diffuse airway narrowing

Diffuse airway narrowing can occur from a number of pathologies; these include:

• relapsing polychondritis
• ulcerative colitis
• amyloidosis: tracheobronchial
• sarcoidosis
• granulomatosis with polyangiitis
• tracheopathia osteochondroplastica
• various infections including
  • tracheobronchial papillomatosis
• asthma
• tracheobronchial malignancies: may rarely manifest with diffuse rather than focal narrowing
• obesity / increased BMI (may cause bronchial hyperresponsiveness )