Hypersensitivity pneumonitis:
Chapter: 12
(Also known as extrinsic allergic alveolitis), is an immunologic lung disease caused by exposure to a variety of inhaled antigens. The clinical presentation may be acute or chronic, and the numerous clinical syndromes are generally given names reflecting the circumstances of exposure, such as farmer's lung, air-conditioner lung, humidifier lung, and bird- fanciers or pigeon breeders lung. Histologically it shows features of chronic interstitial pneumonitis with interstitial non-necrotizing granulomas.
See Also: