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Living with Bronchiolitis obliterans organizing pneumonia

A lung condition with inflammation and scarring that blocks small airways and air sacs.

Understanding Bronchiolitis obliterans organizing pneumonia

Bronchiolitis obliterans organizing pneumonia, also called cryptogenic organizing pneumonia (COP), is a lung condition with inflammation and scarring that blocks the small airways and air sacs.

It is a form of idiopathic interstitial pneumonia (lung disease with no known cause). It can start at a variety of ages.

Signs & symptoms

Symptoms vary from person to person. GARD lists flu-like symptoms among the most common:

  • Cough, often dry
  • Fever
  • Shortness of breath
  • Tiredness (fatigue)
  • Weight loss and loss of appetite
  • Crackling sounds in the lungs

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include lung and breathing specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Children's Interstitial Lung Disease Foundation and Global Autoimmune Institute may keep lists of experts for this condition.

Care & treatment

Care team
Lung and breathing specialists (pulmonologists)
Expert care
Expert lists: Children's Interstitial Lung Disease Foundation, Global Autoimmune Institute
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Children's Interstitial Lung Disease Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which tests, such as chest imaging, confirm this diagnosis?
What treatment options are there, and how will we track my response?
What symptoms mean I should call you or seek care?

Quick facts

Symptoms usually starta variety of ages

The exact cause is unknown (idiopathic).

Respiratory

Also known as: boop; boop - bronchiolitis obliterans organizing pneumonia; bronchiolitis obliterans organising pneumonia; cop; cryptogenic organising pneumonia; cryptogenic organising pneumonitis

Patient organizations

Source: NIH GARD · Bronchiolitis obliterans organizing pneumoniaGARD ID 1620 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Bronchiolitis obliterans organizing pneumonia.

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Explore actively recruiting Bronchiolitis obliterans organizing pneumonia studies with HealthSpark.

HealthSpark

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  • Recruiting studies from ClinicalTrials.gov
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  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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