Pulmonary Edema Roberto Barrios The buildup of extravascular fluid in the lungs is called pulmonary edema. Pulmonary edema is a common complication of cardiac and noncardiac disorders. Cardiogenic pulmonary edema…

Organizing Acute Pneumonia Roberto Barrios When an acute pneumonia does not resolve, it progresses to a subacute and chronic stage, with organization of the acute fibrinous exudates by fibroblast ingrowth….

Small Airways and Inorganic Dusts Philip T. Cagle Small airways (terminal or membranous bronchioles, respiratory bronchioles, and alveolar ducts) may be affected by exposure to both fibrous and nonfibrous mineral…

Diffuse Panbronchiolitis Philip T. Cagle Diffuse panbronchiolitis is a progressive obstructive small-airway disease associated with sinusitis that occurs primarily in adults of Japanese heritage. The disease is typically complicated by…

Follicular Bronchiolitis Timothy C. Allen Philip T. Cagle Follicular bronchiolitis consists of hyperplasia of the bronchus-associated lymphoid tissue so that airways have prominent lymphoid tissue with follicles and germinal centers….

Organizing Pneumonia (Bronchiolitis Obliterans Organizing Pneumonia) Philip T. Cagle Organizing pneumonia (formerly referred to as bronchiolitis obliterans organizing pneumonia [BOOP]) is seen secondary to a variety of lung injuries and…

Pulmonary Thrombi and Emboli Part 1 Thromboemboli Abida K. Haque Pulmonary thromboemboli may be massive, resulting in sudden death, or they may be smaller, with symptoms of mild respiratory distress….

Asthma Alvaro C. Laga Timothy C. Allen Philip T. Cagle Asthma is a disease characterized by increased irritability of the tracheobronchial tree with acute, episodic paroxysmal narrowing of the airways…

Respiratory Bronchiolitis and Membranous Bronchiolitis Philip T. Cagle Tobacco smoking results in inflammatory, sometimes fibrotic, lesions of the membranous (terminal) bronchioles and respiratory bronchioles, referred to as membranous bronchiolitis and…

Constrictive Bronchiolitis Philip T. Cagle Constrictive bronchiolitis is a condition in which the bronchiolar lumens are severely narrowed or obliterated by submucosal scarring. Constrictive bronchiolitis is also called bronchiolitis obliterans…