Idiopathic interstitial pneumonias: review of the latest American Thoracic Society/European Respiratory Society classification

• Main Authors: Daniel Simões Oliveira, José de Arimatéia Araújo Filho, Antonio Fernando Lins Paiva, Eduardo Seigo Ikari, Rodrigo Caruso Chate, César Higa Nomura
• Format: Article
• Language: English
• Published: Colégio Brasileiro de Radiologia e Diagnóstico por Imagem 2018-10-01
• Series: Radiologia Brasileira
• Subjects: Idiopathic interstitial pneumonia; American Thoracic Society; European Respiratory Society
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842018000500321&lng=en&tlng=en

Abstract The diagnosis of idiopathic interstitial pneumonias (IIPs) involves a multidisciplinary scenario in which the radiologist assumes a key role. The latest (2013) update of the IIP classification by the American Thoracic Society/European Respiratory Society proposed some important changes to the original classification of 2002. The novelties include the addition of a new disease (idiopathic pleuroparenchymal fibroelastosis) and the subdivision of the IIPs into four main groups: chronic fibrosing IIPs (idiopathic pulmonary fibrosis and nonspecific interstitial pneumonia); smoking-related IIPs (desquamative interstitial pneumonia and respiratory bronchiolitis-associated interstitial lung disease); acute or subacute IIPs (cryptogenic organizing pneumonia and acute interstitial pneumonia); rare IIPs (lymphoid interstitial pneumonia and idiopathic pleuroparenchymal fibroelastosis); and the so-called “unclassifiable” IIPs. In this study, we review the main clinical, tomographic, and pathological characteristics of each IIP.