<unk>  is not a disease per se but a histopathological finding of the bronchi and bronchioles that is believed to be a nonspecific response to airway injury. It is commonly seen in association with asthma and allergic bronchopulmonary aspergillosis, but can also be observed in non-asthmatics with no identifiable etiological agent.
Bronchocentric granulomatosis
Lymphomatoid granulomatosis
Diffuse panbronchiolitis
Bronchiolitis obliterans
Wegeners granulomatosis
Sarcoidosis
Idiopathic interstitial pneumonia
Tuberculosis