RT Book, Section A1 Zaman, Tanzira A1 Chiang, Giuliana Cerro A1 Noble, Paul W. A2 Grippi, Michael A. A2 Antin-Ozerkis, Danielle E. A2 Dela Cruz, Charles S. A2 Kotloff, Robert M. A2 Kotton, Camille Nelson A2 Pack, Allan I. SR Print(0) ID 1195005752 T1 Idiopathic Pulmonary Fibrosis T2 Fishman’s Pulmonary Diseases and Disorders, 6e YR 2023 FD 2023 PB McGraw-Hill Education PP New York, NY SN 9781260473988 LK accessmedicine.mhmedical.com/content.aspx?aid=1195005752 RD 2024/09/13 AB Interstitial lung disease (ILD) is a heterogenous group of inflammatory and scarring conditions of the lung. Idiopathic pulmonary fibrosis (IPF) is a distinct form of ILD and represents a specific clinical entity defined by a constellation of clinical, radiographic, and pathophysiologic features. Other forms of cryptogenic ILD that do not fit into the diagnostic criteria for IPF are referred to as “unclassifiable” ILD, although some may, in fact, show a clinical trajectory that matches IPF.