Emphysema and Chronic Obstructive Pulmonary Disease W. Richard Webb EMPHYSEMA As defined by the American Thoracic Society, emphysema is “a condition of the lung characterized by permanent, abnormal enlargement of…
Diffuse Cystic Lung Diseases W. Richard Webb Acyst is a thin-walled, well-defined, air-containing lung lesion 1 cm or more in diameter. Cysts may be seen in patients with emphysema (i.e.,…
Allergic Lung Diseases: Hypersensitivity Pneumonitis and Eosinophilic Lung Disease W. Richard Webb HYPERSENSITIVITY PNEUMONITIS Hypersensitivity pneumonitis (HP), also known as extrinsic allergic alveolitis, is an allergic lung disease caused by…
Diffuse Lung Diseases Associated with Calcification W. Richard Webb A wide variety of lung diseases may be associated with some degree of lung calcification, most notably granulomatous diseases such as…
Sarcoidosis W. Richard Webb Sarcoidosis is a systemic disorder of unknown cause, characterized by the presence of noncaseating granulomas. It may involve almost any organ, but most morbidity and mortality…
Diffuse Pulmonary Hemorrhage and Pulmonary Vasculitis W. Richard Webb DIFFUSE PULMONARY HEMORRHAGE Making a specific diagnosis of pulmonary hemorrhage based on radiographic findings is difficult. Lung consolidation visible radiographically in…
Iatrogenic Lung Diseases: Drug-Induced Lung Disease and Radiation Pneumonitis W. Richard Webb DRUG-INDUCED LUNG DISEASE Many drugs, both therapeutic and illicit, can be associated with lung disease. However, drug-induced lung…
Collagen-vascular Diseases W. Richard Webb Collagen-vascular diseases (CVD) may be associated with focal or diffuse pulmonary abnormalities. The type and frequency of lung abnormalities vary with the specific disease. The…
Diffuse Lung Disease Associated with Lipid: Exogenous Lipid Pneumonia and Alveolar Proteinosis W. Richard Webb ENDOGENOUS LIPOID PNEUMONIA Lipoid pneumonia (lung consolidation containing lipids) may be endogenous or exogenous. Endogenous…
The Idiopathic Interstitial Pneumonias Richard W. Web The idiopathic interstitial pneumonias (IIPs) are a heterogeneous group of diffuse lung diseases occurring without known cause and associated with varying degrees of…
