PMID- 31681774 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 2296-858X (Print) IS - 2296-858X (Electronic) IS - 2296-858X (Linking) VI - 6 DP - 2019 TI - Interstitial Pneumonia With Autoimmune Features (IPAF). PG - 209 LID - 10.3389/fmed.2019.00209 [doi] LID - 209 AB - A significant proportion of patients with interstitial lung disease (ILD) manifest autoimmune features, but do not fulfill the diagnostic criteria for a definite connective tissue disease (CTD). In 2015, the European Respiratory Society (ERS) and American Thoracic Society (ATS) "Task Force on undifferentiated Forms of connective tissue disease-associated interstitial lung disease" proposed classification criteria for a so-called research category of Interstitial Pneumonia with Autoimmune Features (IPAF). These classification criteria were based on a combination of features from three domains: a clinical domain consisting of extra-thoracic features; a serologic domain with specific autoantibodies; and a morphologic domain with imaging patterns, histopathological findings or multi-compartment involvement. Patients meeting IPAF criteria tend to have a history of smoking similar to patients with idiopathic pulmonary fibrosis. The most frequent clinical and serological markers of autoimmune features are Raynaud' phenomenon and positive antinuclear antibodies, respectively. Non-specific interstitial pneumonia is the predominant radiologic and histopathologic pattern, although patients meeting IPAF criteria through the clinical and serologic domains may also have a usual interstitial pneumonia pattern. Management should be carefully individualized on a case-by-case basis in keeping with the wide heterogeneity of IPAF and lack of evidence in this particular subgroup of patients. Prognosis is generally intermediate between that of idiopathic pulmonary fibrosis and connective tissue disease-associated interstitial lung disease, but substantially variable according to the predominant histologic and radiologic patterns. As acknowledged by the Task Force, the proposed classification scheme of IPAF is a research concept that will need revision and refinement based on data to better inform prognostication and patient care. CI - Copyright (c) 2019 Fernandes, Nasser, Ahmad and Cottin. FAU - Fernandes, Ligia AU - Fernandes L AD - Departamento do Torax, Centro Hospitalar Lisboa Norte, Lisbon, Portugal. FAU - Nasser, Mouhamad AU - Nasser M AD - Department of Respiratory Medicine, National Reference Center for Rare Pulmonary Diseases, Hospices Civils de Lyon, Lyon, France. FAU - Ahmad, Kais AU - Ahmad K AD - Department of Respiratory Medicine, National Reference Center for Rare Pulmonary Diseases, Hospices Civils de Lyon, Lyon, France. FAU - Cottin, Vincent AU - Cottin V AD - Department of Respiratory Medicine, National Reference Center for Rare Pulmonary Diseases, Hospices Civils de Lyon, Lyon, France. AD - Claude Bernard Lyon 1 University, University of Lyon, INRA, UMR754, Lyon, France. LA - eng PT - Journal Article PT - Review DEP - 20190927 PL - Switzerland TA - Front Med (Lausanne) JT - Frontiers in medicine JID - 101648047 PMC - PMC6798044 OTO - NOTNLM OT - antibody OT - autoimmunity OT - classification OT - connective tissue disease OT - pulmonary fibrosis EDAT- 2019/11/05 06:00 MHDA- 2019/11/05 06:01 PMCR- 2019/09/27 CRDT- 2019/11/05 06:00 PHST- 2019/07/31 00:00 [received] PHST- 2019/09/09 00:00 [accepted] PHST- 2019/11/05 06:00 [entrez] PHST- 2019/11/05 06:00 [pubmed] PHST- 2019/11/05 06:01 [medline] PHST- 2019/09/27 00:00 [pmc-release] AID - 10.3389/fmed.2019.00209 [doi] PST - epublish SO - Front Med (Lausanne). 2019 Sep 27;6:209. doi: 10.3389/fmed.2019.00209. eCollection 2019.