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Cryptogenic Organizing Pneumonia (COP)

Idiopathic interstitial lung disease with patchy organizing pneumonia and corticosteroid responsiveness.

Written by: Saygı Hospital Health Guide Editorial Board
Published:

This content is for general information; please consult your physician for diagnosis and treatment.

References (5)

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What is Cryptogenic Organizing Pneumonia (COP)?

Cryptogenic organizing pneumonia (COP), formerly known as bronchiolitis obliterans organizing pneumonia (BOOP), is an idiopathic interstitial pneumonia characterized by intra-alveolar plugs of granulation tissue with relative preservation of lung architecture.

Patients typically present with subacute flu-like illness, dyspnea, cough, and inflammatory markers, with imaging showing patchy peripheral consolidations and ground-glass opacities that often migrate over time.

Diagnosis requires exclusion of secondary organizing pneumonia (drugs, infection, connective tissue disease, radiation) and is confirmed by characteristic imaging plus surgical or transbronchial biopsy; corticosteroid therapy usually leads to rapid clinical and radiologic improvement, though relapses occur.

Symptoms

Subacute cough lasting weeks to months
Low-grade fever and malaise
Progressive dyspnea on exertion
Weight loss
Inspiratory crackles on auscultation
Migratory consolidations on chest imaging
Failure to respond to standard antibiotics

Risk Factors

Idiopathic in cryptogenic form
Infection (mycoplasma, viruses) for secondary OP
Drugs (amiodarone, methotrexate, sulfa)
Connective tissue diseases
Prior thoracic radiation therapy
Bone marrow or solid organ transplantation
Inhalational and occupational exposures

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Persistent cough not responding to antibiotics
  • Migratory consolidations on serial imaging
  • Subacute progressive dyspnea
  • Suspected interstitial lung disease
  • Need for histopathologic confirmation
  • Relapse after corticosteroid taper
  • Atypical presentation in immunocompromised host

Treatment Methods

01
High-resolution chest CT and pulmonary function tests
02
Bronchoscopy with bronchoalveolar lavage and biopsy
03
Surgical lung biopsy when needed
04
Oral corticosteroids (prednisone) with prolonged taper
05
Treatment of underlying cause in secondary OP
06
Steroid-sparing immunosuppression in relapsing or refractory cases
07
Long-term pulmonologist follow-up

Which Department to Visit?

You can visit our Göğüs Hastalıkları department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Göğüs Hastalıkları Department

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.