Bronchiolar disorders can be divided into 2 general categories: (1) airway
disorders (cellular bronchiolitis and obliterative bronchiolitis) and (2) p
arenchymal disorders (respiratory bronchiolitis-interstitial lung disease,
which occurs in smokers and is treatable with smoking cessation or corticos
teroid therapy, and bronchiolitis obliterans organizing pneumonia, an infla
mmatory lung disease simultaneously involving the terminal bronchioles and
alveoli). This article reviews the clinical findings and therapeutic manage
ment of bronchiolitis obliterans organizing pneumonia.