Histological and clinical classification of idiopathic interstitial pneumonias#
| HISTOLOGICAL PATTERNS | Clinical, Radiological, Pathological diagnoses |
| Usual interstitial pneumonia | Idiopathic pulmonary fibrosis/cryptogenic fibrosing alveolitis |
| Nonspecific interstitial pneumonia | Nonspecific interstitial pneumonia (provisional)¶ |
| Organizing pneumonia | Cryptogenic organizing pneumonia+ |
| Diffuse alveolar damage | Acute interstitial pneumonia |
| Respiratory bronchiolitis | Respiratory bronchiolitis interstitial lung disease |
| Desquamative interstitial pneumonia | Desquamative interstitial pneumonia |
| Lymphocytic interstitial pneumonia | Lymphocytic interstitial pneumonia |
#: Unclassifiable interstitial pneumonia: some cases are unclassifiable for a variety of reasons
¶: This group represents a heterogeneous group with poorly characterized clinical and radiological features that need further study
+: COP is the preferred term, but is synonymous with idiopathic bronchiolitis obliterans organizing pneumonia