Rare lung & airway condition
Fibrothorax and trapped lung
Fibrothorax is a rind of scar tissue encasing the lung after pleural infection, blood or inflammation, preventing it from expanding; decortication surgery can free a trapped lung in selected patients.
Key points
The essentials at a glance.
What to look out for, how the diagnosis is confirmed, who looks after it, and the options that exist.
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Causes include poorly drained pleural infection (empyema), haemothorax, tuberculosis and asbestos-related disease.
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The hallmark is a chronically collapsed or restricted lung with breathlessness and reduced chest wall movement on one side.
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CT distinguishes pleural thickening from residual fluid and shows whether the underlying lung is healthy.
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Decortication - surgically peeling the rind - can restore lung expansion when performed at the right time in the right patient.
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Not everyone benefits: extent of scarring, lung quality and fitness shape a specialist thoracic decision.
Understanding it
What it is, and what happens next.
In plain English - what is going on, how specialists confirm it, and the routes to treatment in the UK.
The pleural space tolerates insults badly: infected or bloody fluid left too long organises into a fibrous peel that welds the lung down and stiffens the chest wall. Function is lost not because lung tissue is destroyed but because it is imprisoned - a distinction with therapeutic consequences, since a healthy lung released early can reinflate and work again.
Management is a thoracic surgical judgement: imaging assesses the rind and the lung beneath, timing matters (established fibrothorax is usually observed for months before surgery to let inflammation mature), and video-assisted or open decortication is offered where breathlessness is significant and the trapped lung looks salvageable - with honest counselling where it does not. In many parts of the UK, routine NHS outpatient referrals for problems like this can take several months, whereas an initial appointment with a private consultant is typically available within around two weeks.
A quiet reminder
This guide is for information, not medical advice.
Your GP or specialist knows your history and can tell you which parts apply to you. If in doubt, speak to them.
Published 2026-09-27 · Next review 2027-09-27
Frequently asked
Common questions about Fibrothorax and trapped lung.
Quick, plain-English answers to what people ask us most.
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What is fibrothorax and trapped lung?
Fibrothorax is thickening and scarring of the pleura (the lining around the lung) that restricts lung expansion, while a trapped lung refers to a lung that's become encased by a fibrous layer, unable to fully re-expand even after fluid is drained from around it.
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What causes fibrothorax and trapped lung?
These typically develop after a longstanding or recurrent pleural effusion, empyema (infected fluid), haemothorax (blood), or inflammatory conditions, where the healing process leaves behind thickened, restrictive scar tissue.
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What are the symptoms?
Persistent breathlessness, particularly with exertion, and a feeling of chest tightness are typical, often developing gradually after a prior pleural problem that didn't fully resolve.
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Is fibrothorax dangerous?
It's not immediately life-threatening, but it can cause significant, lasting breathlessness and reduced exercise tolerance by permanently restricting how much the lung can expand.
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Can fibrothorax or trapped lung be treated?
Yes, for suitable patients, surgery to strip away the thickened, restrictive pleural tissue (decortication) can significantly improve lung function and breathlessness, though this is a bigger procedure requiring specialist assessment.
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How is fibrothorax diagnosed?
CT imaging showing pleural thickening, combined with lung function tests demonstrating a restrictive pattern, and sometimes specific tests to confirm a trapped lung, establish the diagnosis.
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How long does recovery from decortication surgery take?
Recovery from this more extensive chest surgery typically takes several weeks to a few months, with gradual improvement in breathing capacity as the lung is able to expand more fully.
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Trapped lung vs fibrothorax — what's the difference?
A trapped lung specifically refers to a lung restricted by a fibrous layer typically after a resolved pleural effusion, while fibrothorax describes more extensive, longstanding pleural scarring; the two overlap and are managed with similar surgical approaches when significant.
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Is surgery always needed for fibrothorax?
No, milder cases without significant symptoms may simply be monitored, with surgery reserved for those with substantial breathlessness and functional restriction confirmed on lung function testing.
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When should I see a specialist, and how quickly can I be seen privately?
See a respiratory specialist if breathlessness persists after a previous pleural problem. Private specialist assessment is typically available within about two weeks, considerably faster than standard NHS referral timelines.