
Abstract: The idiopathic interstitial pneumonias (IIPs) are the most commonly diagnosed forms of interstitial lung disease. These diseases represent specific clinicopathologic entities characterized by varying degrees of lung parenchymal inflammation and fibrosis. While most patients present with chronic dyspnea and have evidence of restriction on pulmonary function testing, certain findings can help differentiate among the IIPs. For example, patients with idiopathic pulmonary fibrosis (IPF)--the most common IIP--commonly present in the sixth or seventh decade of life, while those with desquamative interstitial pneumonia or respiratory bronchiolitis with interstitial lung disease typically present in the third or fourth decade of life and have a history of smoking. IPF is characterized by usual interstitial pneumonia (UIP) on lung biopsy; a UIP pattern can also be identified by high-resolution CT. (J Respir Dis. 2005;26(9):372-378)

































































































































































































































































































































