Viral Pneumonia Jud W. Gurney, MD, FACR Key Facts Terminology Pulmonary infection with viral pathogen typically affects respiratory epithelium from trachea to terminal bronchioles Pneumonic (alveolar involvement) less common but…

Intralobar Sequestration Jud W. Gurney, MD, FACR Key Facts Terminology Pulmonary sequestration represents nonfunctioning lung tissue separated from normal lung Receives its blood supply from systemic artery Intralobar sequestration (90%)…

Tuberculosis, Miliary Martha Huller Maier, MD Key Fact Terminology Fulminant infection with Mycobacterium tuberculosis disseminated via bloodstream Imaging Findings Nodules small and uniform in size, usually too numerous to count…

Lymphoproliferative Disorder Jud W. Gurney, MD, FACR Key Facts Terminology Lymphoproliferative disorders strongly related to either autoimmune diseases or immunosuppressed conditions Follicular bronchiolitis Small nodules and mediastinal lymphadenopathy common Lymphocytic…

Cryptogenic Organizing Pneumonia Jud W. Gurney, MD, FACR Key Facts Terminology Clinicopathological entity characterized by polypoid plugs of loose granulation tissue within air spaces Imaging Findings Multiple alveolar opacities (90%)…

Diffuse Pulmonary Lymphangiomatosis Melissa L. Rosado-de-Christenson, MD, FACR Key Facts Terminology Congenital disorder characterized by proliferation and dilatation of lymphatic channels Imaging Findings Radiography: Reticular opacities and pleural effusions CT…

Silicosis, Complex Kimberly E. Sanchez, MD Aqeel A. Chowdhry, MD Tan-Lucien H. Mohammed, MD, FCCP Key Facts Terminology Complicated pneumoconiosis: Aggregation of nodules into large masses > 1 cm in…

Silicosis, Simple Melinda Z. Rixey, MD Aqeel A. Chowdhry, MD Tan-Lucien H. Mohammed, MD, FCCP Key Facts Terminology Simple pneumoconiosis: Micronodules < 1 cm develop more than 10 years after…

Berylliosis Jud W. Gurney, MD, FACR Key Facts Terminology Strong lightweight element with a high melting point, used in alloys in wide variety of industries Inhalation causes 2 pulmonary syndromes:…

Hard-Metal Disease Tan-Lucien H. Mohammed, MD, FCCP Key Facts Terminology Hard-metal disease: Pneumoconiosis due to dust inhalation of cemented tungsten carbide (WC) Distinct histologic finding of giant cell pneumonitis Imaging…