Table 1. Transition of Classification of Interstitial Pneumonia.

^*This group represents a heterogeneous group with poorly characterized clinical and radiologic features that needs further study. AIP = acute interstitial pneumonia, ALAT = Latin American Thoracic Association, ATS = American Thoracic Society, BIP = bronchiolitis obliterans interstitial pneumonia and diffuse alveolar damage, BOOP = bronchiolitis obliterans-organizing pneumonia, COP = cryptogenic organizing pneumonia, DAD = diffuse alveolar damage, DIP = desquamative interstitial pneumonia, ERS = European Respiratory Society, GIP = giant cell interstitial pneumonia, HRCT = high-resolution CT, IIP = idiopathic interstitial pneumonia, IPF = idiopathic interstitial fibrosis, JRS = Japan Respiratory Society, LIP = lymphocytic interstitial pneumonia, NSIP = nonspecific interstitial pneumonia, OP = organizing pneumonia, RB = respiratory bronchiolitis, RB-ILD = respiratory bronchiolitis-interstitial pneumonia, UIP = usual interstitial pneumonia