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After your lung biopsy

Pneumothorax After — a Lung Biopsy

Pneumothorax — a partial or complete collapse of the lung — is the complication your biopsy team watches for most closely. It happens when air leaks into the space around the lung through the needle track. Most cases are small and settle without surgery. A smaller number need prompt drainage, and symptoms can appear within hours of leaving the procedure room.

Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed September 2026

  • The most common serious risk — Pneumothorax is the complication your radiologist is trained to detect and treat after a lung biopsy.
  • Most cases are small — A proportion of patients develop a small air leak that resolves with oxygen and observation, without a drain.
  • Symptoms appear fast — Chest pain or shortness of breath on the biopsy side can develop within an hour or two of the procedure.
  • Treatable when caught early — Whether small or large, a pneumothorax found quickly is manageable. Delay is what makes it more dangerous.
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A collapsed lung (pneumothorax) is the most common serious complication of CT-guided lung biopsy. Most cases are small and settle with oxygen and observation. Symptoms — sudden chest pain or shortness of breath on the biopsy side — can appear within hours. Call your biopsy team immediately if either develops.

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MBBS, DNB (Internal Medicine), DM (Medical Oncology)

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MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)

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Dr. Owais Mohammed

MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)

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Dr. Raghavendra Naik

MBBS, MS (General Surgery), M.Ch (Surgical Oncology)

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Surgical Oncologist

Dr. Mohammed Imaduddin

M.B.B.S, MS (General Surgery), M.Ch (Surgical Oncology)

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MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)

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Call your biopsy team today if you notice any of these

  • New chest discomfort on the side where the biopsy was done, even if it feels mild
  • Breathing that feels slightly harder or shallower than before the procedure
  • A dry cough that started after leaving the biopsy suite
  • Your heart feels like it is beating faster than usual
  • Feeling lightheaded or more tired than you expected after the procedure
  • Any new symptom that was not mentioned in your discharge instructions

What determines the treatment you will need?

FeatureSmall pneumothoraxLarge or symptomatic pneumothorax
Appearance on scanNarrow rim of air, lung still largely openWide band of air, lung markedly collapsed
Main symptomsMild chest discomfort, breathing slightly harderSignificant shortness of breath, pain at rest
Immediate treatmentOxygen, close observation, repeat scanAspiration needle or chest drain
Hospital stayHours to overnightUntil the lung fully re-expands, often longer
Typically startsWithin hours of the biopsy procedureWithin hours of the biopsy procedure

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Common questions

Frequently asked questions

How common is pneumothorax after a lung biopsy?

Pneumothorax is the most common serious complication of CT-guided percutaneous lung biopsy. Radiology society guidance including the British Thoracic Society acknowledges it occurs in a meaningful minority of procedures. A smaller proportion of those cases need active treatment such as drainage — most settle with oxygen and observation. Your radiologist monitors you after the biopsy precisely because of this known risk, and that monitoring period is when small cases are caught before they become large ones.

Will I need a chest drain if I get a pneumothorax?

Not necessarily. Whether a drain is needed depends on the size of the air leak and your symptoms. A small pneumothorax with minimal symptoms is often managed with supplemental oxygen and close observation, with repeat imaging to confirm it is stable or resolving. A drain or aspiration is used when the lung has collapsed significantly or when symptoms are not improving. Your team makes that decision based on your scan and how you are feeling — not on the diagnosis alone.

How long does recovery take after a pneumothorax from a biopsy?

A small pneumothorax managed with observation typically resolves within days, and most people feel close to normal within a week. A larger one requiring a chest drain may take longer, depending on how quickly the lung re-expands. Your team will confirm resolution with a follow-up scan before discharging you. You will usually be advised to avoid strenuous activity and air travel for a period after recovery — your team will give you a specific timeframe based on how you responded to treatment.

Does getting a pneumothorax mean the biopsy result is not usable?

Not usually. The biopsy sample and the complication are separate events. Most of the time, adequate tissue is collected before a pneumothorax develops, and the pathology result proceeds normally. If the procedure had to be stopped early before enough tissue was obtained, your team will discuss whether a repeat biopsy or an alternative approach — such as a bronchoscopy or a surgical biopsy — is needed. Ask directly whether your sample was sufficient when you receive your result.

Full index

Browse all 701 biopsy topics

Every page in this section, grouped by the part of the journey it belongs to. Pick a group to see what is in it.

What Is a Biopsy?

What Is a Biopsy? Everything You Need to Know →

Types of Biopsy Compared

Which Biopsy Will You Have? Techniques Compared →

Preparing for a Biopsy

What to Expect on the Day of Your Biopsy →

Recovery and Aftercare

After a Biopsy: Recovery, Aftercare and Warning Signs →

Biopsy by Body Part

Biopsy by Body Part: What to Expect at Each Site →

Understanding Your Report

How to Read a Biopsy Report: Terms Explained →

IHC and Molecular Markers

IHC and Molecular Markers on a Biopsy: What They Mean →

Grading and Scoring Systems

Cytology & Prostate Scoring Systems Explained →

How Accurate Is a Biopsy?

How Accurate Is a Biopsy? Errors and Second Opinions →

If Your Result Is Benign

Your Biopsy Is Benign: What It Means and What Comes Next →

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