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Your lung biopsy, explained

Lung Biopsy: — What to Expect

A lung nodule or shadow on a chest scan is one of the most frightening findings to hear about. In India, many of these turn out to be old TB scars or healed infections — but the only way to know for certain is a biopsy. A lung biopsy takes a small tissue sample and sends it to a pathologist, who can say exactly what you are dealing with.

Medically reviewed by Dr. Mohammed Imaduddin, Surgical Oncologist, MBBS · MS (General Surgery) · M.Ch (Surgical Oncology) · Last reviewed September 2026

  • Not every nodule is cancer — In India, a lung shadow is commonly caused by old TB or infection. A biopsy distinguishes these from cancer.
  • Three approaches are used — Needle through the chest wall, bronchoscopy through the airways, or short surgery — the right one depends on where the abnormality sits.
  • Local anaesthetic for most — Needle biopsies and bronchoscopies do not need a general anaesthetic. Most people describe discomfort rather than pain.
  • Pneumothorax is the main risk — Air entering around the lung is the most common complication of a needle biopsy. Most cases are small and settle without a drain.
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A lung biopsy removes a small piece of tissue from an abnormal area on your scan and sends it to a laboratory for analysis. Your doctor chooses between a needle through the chest wall, a bronchoscopy through the airways, or a short surgical procedure. The choice depends on where the abnormality sits.

Which type of lung biopsy will I have?

The technique depends on where the abnormal area is. A spot in the outer part of the lung, away from the airways, is usually reached with a needle inserted through the chest wall while a CT scanner shows exactly where to direct it — no cut beyond a pinhole entry.

If the abnormality sits near a large airway, a bronchoscopy may be used. A thin flexible tube is passed through the mouth into the airway, and the sample is taken through it without cutting the skin.

When neither needle nor bronchoscopy can safely reach the tissue, a short operation called VATS is offered — performed under general anaesthetic through one or two small cuts between the ribs.

In India, a lung nodule is frequently caused by old TB scarring or a fungal infection rather than cancer, particularly if you have a history of TB. The biopsy result is what tells you which it is.

What do I need to do before the biopsy?

  • Tell your team every medicine you take — blood thinners and aspirin in particular, as these affect bleeding risk.
  • Do not eat or drink for the number of hours your team specifies before the procedure.
  • Arrange someone to drive you home — you cannot drive after sedation.
  • Bring your recent CT scan or disc if your team does not already have it at the centre.
  • Tell your team if you have ever had a collapsed lung, a pacemaker, or any significant breathing condition.

What do these medical terms mean?

CT-guided needle biopsy
A needle inserted through the chest wall while a CT scanner shows exactly where to direct it — no cut required beyond a pinhole entry point.
Bronchoscopy
A thin flexible tube passed through the mouth or nose into the airways, used to take samples from tissue near a large airway — done under sedation, not general anaesthetic.
VATS (video-assisted thoracoscopic surgery)
A short operation under general anaesthetic, using a small camera inserted through a tiny cut between the ribs to reach tissue the needle cannot safely access.
Pneumothorax
Air entering the space around the lung after a needle biopsy, causing partial collapse. The most common complication of CT-guided biopsy — most cases are small and settle without a drain.
Granuloma
A pattern of inflammation the pathologist sees under the microscope that typically indicates TB or another infection rather than cancer. The two look distinctly different on a biopsy report.

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Will it hurt?

A CT-guided biopsy is done under local anaesthetic. The injection to numb the chest wall stings briefly; after that most people feel pressure and awareness of the needle, not sharp pain.

A bronchoscopy uses a throat spray and sedation. The tube in the airway is uncomfortable and you may cough, but sedation means many people remember little of the procedure itself.

A VATS biopsy is done under general anaesthetic — you are asleep throughout and feel nothing during the procedure. There is soreness at the small cut sites for a few days after.

What are the risks of a lung biopsy?

The main risks are pneumothorax, bleeding, and the possibility of an inconclusive result.

Pneumothorax — air entering around the lung, causing partial collapse — is the most common complication of a CT-guided needle biopsy. NCCN and ESMO guidelines describe it as a well-recognised risk occurring in a notable proportion of cases. Most cases are small and settle under observation alone. A smaller number need a temporary drain placed between the ribs.

Bleeding at the biopsy site is another known risk and is usually minor. Significant bleeding is less common.

A biopsy cannot guarantee a definitive result. If the needle missed the abnormal area, the report may be inconclusive and a second procedure may be offered. When TB is identified, the laboratory also tests for drug resistance — that result changes which medicines are needed.

What happens after a lung biopsy?

What should I watch for when I go home after a needle biopsy?

Call your team or go to emergency immediately if you develop sudden chest pain, worsening shortness of breath, or feel your breathing has changed since leaving the centre. These can be signs of a pneumothorax that developed after you were discharged. Also call if you cough up more than a small amount of blood, or develop a fever in the days following the procedure. Do not dismiss new chest symptoms as unrelated — your team needs to know promptly.

Can I go home the same day?

Most CT-guided needle biopsies and bronchoscopic biopsies are day-care procedures. You will be observed for one to two hours after the procedure, and a chest X-ray is typically done before discharge to confirm no significant pneumothorax has developed. VATS is different: it is performed under general anaesthetic and usually requires an overnight stay. Ask your team before the day what the discharge plan is for your specific procedure.

How long will the result take?

Histopathology results typically take one to two weeks from when the sample reaches the laboratory. If your team suspects TB, cultures may be sent alongside the biopsy — those results often take several weeks longer because the bacteria grow slowly in culture. Ask before you leave what the expected timeline is for your case, and follow up with your team if you have not heard within that window.

What if the result comes back inconclusive?

An inconclusive result means the tissue sample could not give a definitive answer — it neither confirms nor rules out any particular diagnosis. Your oncologist will review whether to repeat the biopsy using the same or a different technique, whether tests such as PET-CT or sputum culture can add information, or whether monitoring with repeat scans is appropriate for your situation. A clear next step will be discussed with you.

Does CION perform lung biopsies?

CT-guided needle biopsies and bronchoscopic biopsies are performed across CION centres. When a surgical approach such as VATS is needed, it is coordinated with surgical colleagues at appropriate facilities. PET-CT scans, which are sometimes needed to identify the best biopsy site or to assess a result, are arranged through CION's partner imaging centres. Your team at CION will explain which approach is planned for you and where it will be done.

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Common questions

Frequently asked questions

The scan shows a lung nodule — does that mean I have cancer?

Not necessarily. In India, a lung nodule is frequently caused by old TB scarring, a healed infection, or scar tissue rather than cancer. A scan shows the size and shape of an abnormality but cannot say what it is made of — that is what the biopsy is for. Your team uses the scan findings alongside your history, symptoms and risk factors to decide whether a biopsy is needed and how urgently.

How accurate is a lung biopsy?

When the sample reaches the abnormal area and is adequate in size, the result is reliable. Accuracy depends on the technique used, the location and size of the target, and the quality of the sample obtained. A proportion of needle biopsies return inconclusive results, typically because the needle passed near rather than through the abnormal tissue. NCCN guidance acknowledges this as a recognised limitation — your team will tell you whether the sample was considered adequate.

What happens if the biopsy result is inconclusive?

An inconclusive result means the sample did not give a definitive answer — it does not confirm or rule out any diagnosis. Your oncologist will review whether a repeat biopsy makes sense, whether a different technique would reach the tissue more reliably, or whether additional tests such as PET-CT or sputum culture can provide the answer. In some situations, particularly with small nodules and low clinical risk, monitoring with repeat scans is the right approach.

Is a lung biopsy dangerous?

It carries real risks that your team weighs against the value of having a diagnosis. Pneumothorax is the most common significant complication after a CT-guided needle biopsy — NCCN and ESMO both describe it as a well-recognised risk occurring in a notable proportion of cases; most are small and settle under observation, while a proportion need a temporary drain. Significant bleeding and infection are less common. In most cases, knowing what the abnormality is matters more than leaving it undiagnosed.

How does the biopsy tell TB apart from cancer?

The tissue sample is examined under a microscope by a pathologist. TB produces a distinctive pattern called granulomatous inflammation that the pathologist can identify and distinguish from the abnormal cell pattern that indicates cancer. The laboratory may also culture the sample to grow any bacteria present — this confirms TB and checks for drug resistance, though cultures take several weeks. The pathology report will state a clear diagnosis in most cases.

How long does the biopsy procedure itself take?

A CT-guided needle biopsy typically takes 30 to 60 minutes from when you lie on the scanner table to the final check image. A bronchoscopy is similar in length. Both include positioning and preparation time; the actual sampling is brief. You will then be observed for one to two hours and a chest X-ray done before discharge. VATS is a longer procedure under general anaesthetic and will be explained to you separately by the surgical team.

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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