Chronic Bronchitis Alvaro C. Laga Timothy C. Allen Philip T. Cagle Chronic bronchitis is defined clinically as persistent cough with sputum production for at least 3 months in at least…

Pulmonary Infarct Abida K. Haque The lung has a dual vascular supply; therefore infarction is uncommon, unless there is preexisting pulmonary or cardiac disease resulting in a low flow state….

Pulmonary Hemorrhage without Vasculitis Pulmonary hemorrhage ranges from a focal procedural finding to a dramatic manifestation of underlying lung disease, and may be seen associated with or without vasculitis. In…

Pulmonary Veno-Occlusive Disease Abida K. Haque Keith M. Kerr Pulmonary veno-occlusive disease (PVOD) is currently classified as a type of pulmonary arterial hypertension associated with significant venous or capillary involvement….

Sarcomas Primary sarcomas of the lung are very rare. Most sarcomas in the lung are metastases from other primary sites. The histopathologic features of sarcomas in the lung are generally…

Pulmonary Hypertension Associated with Hypoxemia Abida K. Haque Roberto Barrios Pulmonary hypertension may be associated with hypoxemia in diseases such as chronic obstructive lung disease and interstitial lung disease. Chronic…

Pulmonary Arterial Hypertension Abida K. Haque Pulmonary arterial hypertension (PAH) is defined as a sustained elevation of pulmonary arterial pressure greater than 25 mm Hg at rest or greater than…

Pulmonary Capillary Hemangiomatosis Abida K. Haque Pulmonary capillary hemangiomatosis lesions are seen in association with pulmonary veno-occlusive disease and pulmonary hypertension. Histologic Features

Nodules Resembling Granulomas Some lesions may grossly or microscopically mimic granulomas and enter into their differential diagnosis. These lesions include rheumatoid nodules and nodules arising in malakoplakia. Part 1 Rheumatoid…

Foreign-Body Granulomas Foreign-body granulomas may occur in the lung in the setting of intravenous drug abuse, chronic aspiration, and mineral oil aspiration, among other situations. Part 1 Intravenous Drug Abuse…