Faculty Opinions recommendation of American Thoracic Society/European Respiratory Society International Multidisciplinary Consensus Classification of the Idiopathic Interstitial Pneumonias. This joint statement of the American Thoracic Society (ATS), and the European Respiratory Society (ERS) was adopted by the ATS board of directors, June 2001 and by the ERS Executive Committee, June 2001.

Context.— In 2013, the revised American Thoracic Society and European Respiratory Society classification of idiopathic interstitial pneumonias (IIPs) described 2 rare IIPs and 2 rare histologic patterns. Because of the rarity of the disease, there is limited evidence related to the histology. Because the rare histologic patterns are provisional criteria, no unanimous consensus on histologic diagnostic criteria has yet been reached. Objective.— To review the histologic features for rare IIPs and rare histologic patterns, and to provide diagnostic aids and discuss the differential diagnosis. Data Sources.— Published peer-reviewed literature and the authors' personal experience. Conclusions.— Following the publication of the international consensus classification, evidence regarding rare IIPs and rare histologic patterns has accumulated to some extent, although to date the amount remains insufficient and further evidence is required. Because the diagnosis is sometimes challenging, a multidisciplinary approach represents the gold standard in reaching an accurate diagnosis for these rare disorders.

Download Full-text

Pathology of Idiopathic Interstitial Pneumonias

Clinical Medicine Insights Circulatory Respiratory and Pulmonary Medicine ◽

10.4137/ccrpm.s23320 ◽

2015 ◽

Vol 9s1 ◽

pp. CCRPM.S23320 ◽

Cited By ~ 2

Author(s):

Mikiko Hashisako ◽

Junya Fukuoka

Keyword(s):

Interstitial Pneumonia ◽

American Thoracic Society ◽

Organizing Pneumonia ◽

European Respiratory Society ◽

Pleuroparenchymal Fibroelastosis ◽

Idiopathic Interstitial Pneumonias ◽

Areas Of Concern ◽

Histopathologic Features

The updated classification of idiopathic interstitial pneumonias (IIPs) in 2013 by American Thoracic Society/European Respiratory Society included several important revisions to the categories described in the 2002 classification. In the updated classification, lymphoid interstitial pneumonia (LIP) was moved from major to rare IIPs, pleuroparenchymal fibroelastosis (PPFE) was newly included in the rare IIPs, acute fibrinous and organizing pneumonia (AFOP) and interstitial pneumonias with a bronchiolocentric distribution are recognized as rare histologic patterns, and unclassifiable IIP (UCIP) was classified as an IIP. However, recent reports indicate the areas of concern that may require further evaluation. Here, we describe the histopathologic features of the updated IIPs and their rare histologic patterns and also point out some of the issues to be considered in this context.

Download Full-text

Invited Commentary on “American Thoracic Society–European Respiratory Society Classification of the Idiopathic Interstitial Pneumonias”

Radiographics ◽

10.1148/rg.2015150034 ◽

2015 ◽

Vol 35 (7) ◽

pp. 1871-1872

Author(s):

Theresa C. McLoud

Keyword(s):

American Thoracic Society ◽

European Respiratory Society ◽

Idiopathic Interstitial Pneumonias

Download Full-text

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

Radiologia Brasileira ◽

10.1590/0100-3984.2016.0134 ◽

2018 ◽

Vol 51 (5) ◽

pp. 321-327 ◽

Cited By ~ 5

Author(s):

Daniel Simões Oliveira ◽

José de Arimatéia Araújo Filho ◽

Antonio Fernando Lins Paiva ◽

Eduardo Seigo Ikari ◽

Rodrigo Caruso Chate ◽

...

Keyword(s):

Interstitial Pneumonia ◽

American Thoracic Society ◽

European Respiratory Society ◽

Cryptogenic Organizing Pneumonia ◽

Pleuroparenchymal Fibroelastosis ◽

Idiopathic Interstitial Pneumonias ◽

Acute Interstitial Pneumonia ◽

Nonspecific Interstitial Pneumonia ◽

Original Classification

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.

Download Full-text