<prompt> Pulmonary function abnormalities in interstitial lung diseases include all of the following, EXCEPT:Reduced vital capacityReduced FEV1FVC ratioReduced diffusion capacityReduced total lung capacity  <response>: Most forms of ILD produce a restrictive defect with reduced total lung capacity TLC, functional residual capacity, and residual volume. Forced expiratory volume in one second FEV1 and forced vital capacity FVC are reduced, but these changes are related to the decreased TLC. The FEV1FVC ratio is usually normal or increased. A reduction in the diffusing capacity of the lung for carbon monoxide DLCO is a common but nonspecific finding in most ILDs. Ref: King, T.E. 2012. Chapter 261. Interstitial Lung Diseases. In D.L. Longo, A.S. Fauci, D.L. Kasper, S.L. Hauser, J.L. Jameson, J. Loscalzo Eds, Harrisons Principles of Internal Medicine, 18e. 