Types

 idiopathic interstitial pneumonias

• usual interstitial pneumonia (UIP)
• nonspecific interstitial pneumonia (NSIP)
• cryptogenic organizing pneumonia
• respiratory bronchiolitis-associated lung disease
• desquamative interstitial pneumonia (DIP)
• lymphoid interstitial pneumonia (LIP)

 chronic manifestations of systemic dysimmune syndromes

• rehumatoid arthritis
• progressive systemic sclerosis
• systemic lupus erythematosus
• polymyositis/dermatomyositis
• Sjögren syndrome

 diffuse eosinophilic lung disease
 drug associated diffuse lung disease
 diffuse lung diseases with granulomas

• sarcoidosis
• chronic berylliosis
• hypersensitivity pneumonitis (extrinsic allergic alveolitis)

 miscellaneous diffuse lung diseases

• pulmonary Langerhans cell histiocytosis
• Erheim-CHester disease
• systemic juvenile xanthogranulomatosis
• lymphangioleiomyomatosis
• Hermansky-Pudlak syndrome
• pulmonary alveolar microlithiasis
• pulmnary alveolar proteinosis
• lymphangitic carcinomatosis