<unk>  <unk>  is an idiopathic (of unknown cause) inflammatory lung disease, considered to be a type of COPD. It is a severe, progressive form of bronchiolitis, mainly affecting the respiratory bronchioles (the section of the bronchioles involved in gas exchange).
The term<unk> " refers to the lesions which appear throughout both lungs, while the term "pan-" refers to the inflammation found in all layers of the respiratory bronchioles, both terms describing a common pathology for the disease.
If left untreated,<unk>  is fatal, usually progressing to bronchiectasis, an irreversible lung conditon that causes respiratory failure.
Diffuse panbronchiolitis
Bronchocentric granulomatosis
Hypersensitivity pneumonitis
Eosinophilic pneumonia
Desquamative interstitial pneumonia
Bronchiolitis obliterans
CMV pneumonitis
Lymphocytic interstitial pneumonia