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Cryptogenic organizing pneumonia

Other Names for this Disease
  • COP
  • Idiopathic BOOP
  • Idiopathic bronchiolitis obliterans organizing pneumonia
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Cryptogenic organizing pneumonia (COP) is a rapidly developing inflammatory lung disease characterized by flu-like symptoms including cough, fever, malaise, fatigue and weight loss. COP often affects adults in midlife (40 to 60 years of age). No predisposing factors have been identified and the cause is often unknown. Diagnosis may be made through computed tomography (CT) scan or lung biopsy. Response to treatment with corticosteroids is generally favorable.[1][2]
Last updated: 3/15/2013


  1. Cordier JF, Costabel U, du Bois R. Cryptogenic organizing pneumonia. Orphanet. 2004; Accessed 11/4/2011.
  2. King TE. Idiopathic Interstitial Pneumonias. The Merck Manual Home Health Handbook. 2008; Accessed 11/4/2011.
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