Cryptogenic Organizing Pneumonia

Synonyms

BOOP

Bronchiolitis Obliterans Organizing Pneumonia

Cryptogenic Organizing Pneumonias

Organizing Pneumonia, Cryptogenic

Organizing Pneumonias, Cryptogenic

Pneumonia, Cryptogenic Organizing

Pneumonias, Cryptogenic Organizing

An interstitial lung disease of unknown etiology, occurring between 21-80 years of age. It is characterized by a dramatic onset of a "pneumonia-like" illness with cough, fever, malaise, fatigue, and weight loss. Pathological features include prominent interstitial inflammation without collagen fibrosis, diffuse fibroblastic foci, and no microscopic honeycomb change. There is excessive proliferation of granulation tissue within small airways and alveolar ducts.