%0 Journal Article %A Kirk D. Jones %T Unclassifiable interstitial lung disease: a pathologist's perspective %D 2018 %R 10.1183/16000617.0132-2017 %J European Respiratory Review %P 170132 %V 27 %N 147 %X Classifying pulmonary fibrotic disease into various diagnostic categories provides the clinician with expectations for both prognosis and proper treatment. Despite years of experience with histological, radiological and clinical guidelines, a group of patients remains with unclassifiable interstitial lung disease. In this article, the possible barriers to classification will be explored, and some strategies will be discussed to aid in overcoming these barriers.What are the sources of unclassifiable interstitial fibrosis? What factors prevent a definitive diagnosis? http://ow.ly/PMY530iUCCY %U https://err.ersjournals.com/content/errev/27/147/170132.full.pdf