Computed tomography scan of an 81-year old man with biopsy-proven IPF. A peripheral distribution of reticular opacities is demonstrated. Honeycombing and traction bronchiectasis are notably absent. In the absence of specific findings, a surgical lung biopsy was needed to make a diagnosis. * Reprinted from Fishman's Pulmonary Diseases and Disorders, 4th edition 2007. Meltzer, EB and Noble, PW: Chapter 70, Idiopathic Pulmonary Fibrosis. With permission from McGraw-Hill Companies.