An idiopathic<unk><unk> s (IIPs) classification faced difficulties as the disease behavior is overlapping, which makes it difficult to be classified from other pulmonary diseases of heterogenous clinical course. . However the American Thoracic Society/European Respiratory Society (ATS/ERS) Classification of 2002 defined seven specific entities provided standardized terminology and diagnostic criteria.Later, many publications have led to adopt general changes in the 2007 statement update by ATS/ERS. The new changes emphasized that the histologic diagnosis as a historical gold standard is replaced by a multidisciplinary approach with close interaction of clinician, radiologist, and pathologist. With the era of molecular markers and multidisciplinary approach, surgical biopsy to diagnose the respiratory bronchiolitis-interstitial lung disease is not needed anymore, nonspecific<unk><unk>  is now better defined and rare disease as pleuroparenchymal fibroelastosis is introduced. The heterogeneous mixed pattern with acute exacerbation is now defined as a clinical course for idiopathic pulmonary fibrosis and nonspecific<unk><unk> .
Idiopathic interstitial pneumonia classification
Eosinophilic pneumonia classification
Hypersensitivity pneumonitis classification
Idiopathic pulmonary fibrosis classification
Lymphomatoid granulomatosis classification
Idiopathic interstitial pneumonia diagnostic criteria
Bronchiectasis classification
Idiopathic interstitial pneumonia Diagnostic criteria