Table 1. Histological classification of bronchiolar disorders
Primary bronchiolar disorders
    Constrictive bronchiolitis (obliterative bronchiolitis and bronchiolitis obliterans)
    Acute bronchiolitis
    Diffuse panbronchiolitis
    Respiratory bronchiolitis (smoker's bronchiolitis)
    Mineral dust airway disease
    Follicular bronchiolitis
    Other primary bronchiolar disorders, e.g. diffuse aspiration bronchiolitis and lymphocytic bronchiolitis
Interstitial lung disease with a prominent bronchiolar involvement
    Hypersensitivity pneumonitis
    Respiratory bronchiolitis-associated interstitial lung disease
    Cryptogenic organising pneumonia
    Other interstitial lung disease (pulmonary Langherans' cell hystiocytosis, sarcoidosis and bronchiolocentric interstitial pneumonia)
Bronchiolar involvement in diseases also involving large airways
    Chronic obstructive pulmonary disease
    Bronchiectasis, including cystic fibrosis
  • Adapted from [8] with permission from the publisher.