This issue of Radiologic Clinics of North America focuses on Diffuse Lung Disease, and is edited by Dr. Jeffrey Kanne. Articles will include: Idiopathic Interstitial Pneumonias: An Update; Collagen-Vascular Diseases; Hypersensitivity Pneumonitis; Acute Lung Injury; Occupational Lung Diseases; Pulmonary Vasculitis; Eosinophilic Lung Diseases; Large Airways Diseases; Small Airways Diseases; Smoking Related Lung Diseases; Pulmonary Hypertension; and more!