Classification can be complex, and the combined efforts of clinicians, radiologists, and pathologists can help in the generation of a more specific diagnosis.<unk>  can be subclassified based on histologic appearance into the following patterns: Histology Clinical Correlates Desquamative<unk>  pneumonia (DIP) DIP Diffuse alveolar damage (DAD) ARDS, AIP, TRALI Nonspecific<unk>  pneumonia (NSIP) NSIP Respiratory bronchiolitis RB-ILD Usual<unk>  pneumonia (UIP) CVD, IPF, drug toxicity, pneumoconiosis Organizing pneumonia Cryptogenic organizing pneumonia Lymphoid<unk>  pneumonia (LIP) LIP Usual<unk>  pneumonia is the most common type.
Idiopathic interstitial pneumonia
Acute eosinophilic pneumonia
Cryptogenic organizing pneumonia
Allergic bronchopulmonary aspergillosis
Tuberculosis
Chronic pulmonary aspergillosis
Eosinophilic pneumonia
Diffuse panbronchiolitis