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Lung biopsy procedure

Bronchoscopic Lung Biopsy — Procedure, Risks and Which Lesions It Suits

A lung shadow that could be cancer or old TB is frightening to live with. Bronchoscopy is one route to a diagnosis — a camera passed through the airway, without any cut in the chest. Whether it suits your lesion depends on exactly where in the lung it sits.

Medically reviewed by Dr. Bharati Devi Gorantla, Medical Oncologist, MBBS · MD · DM (Adyar, Chennai) · ECMO · MRCP SCE (UK) · Last reviewed September 2026

  • No incision needed — The scope reaches the lung through the natural airway — no entry through the chest wall.
  • Works best for central lesions — Tumours near the main airways can often be sampled directly. Peripheral nodules are usually out of reach.
  • TB and cancer can both be tested — The same biopsy sample can be sent for histology and for TB culture at the same time.
  • Done as day care — Most bronchoscopies take two to four hours in the unit and do not require an overnight stay.
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A bronchoscopy biopsy passes a thin, flexible camera through your mouth or nose, down the windpipe, and into the lung's airways. It takes a tissue sample without cutting through the skin. It works best for tumours growing near the central airways, where the scope can reach directly.

What do these medical terms mean?

Bronchoscope
A thin, flexible camera tube passed through the mouth or nose and down into the lung's airways.
Transbronchial biopsy
Passing small forceps through the bronchoscope to take a tissue sample from the lung wall or a nearby growth.
Endobronchial lesion
A growth visible directly inside an airway, which the scope can reach and sample without going through the airway wall.
Central lesion
An abnormality near the main airways at the centre of the chest, usually within reach of the bronchoscope.
Peripheral lesion
An abnormality at the outer edges of the lung, beyond the normal reach of the bronchoscope.

What happens during a bronchoscopy biopsy?

  1. Fast beforehand

    Nothing to eat or drink for several hours before the procedure. Your team gives the exact timing when you are booked.

  2. Arrive and give consent

    A nurse or doctor reviews the procedure with you and asks you to sign a consent form. Bring any questions you have.

  3. Sedation and throat numbing

    A local anaesthetic spray numbs the throat. A sedative given through a drip makes you relaxed and drowsy. Most people remember little of the procedure.

  4. The scope goes in

    The bronchoscope passes through your mouth, over the vocal cords, and into the airway tree. The team follows your previous scan images to reach the area of concern.

  5. Sampling

    Small tissue pieces are taken with forceps, cells are collected by brushing, or the area is washed with fluid. All samples go to the laboratory.

  6. Recovery and chest X-ray

    You rest for one to two hours in a monitored area. A chest X-ray is done before you leave to check for any air leak. Arrange for someone to take you home.

Which lung lesions does bronchoscopy suit?

Bronchoscopy reaches lesions growing near the central airways — the main bronchi and their closest branches. Tumours growing into or beside an airway can often be sampled directly through the scope.

For nodules at the outer edge of the lung, the scope cannot reach far enough to take a reliable sample. NCCN guidance notes that diagnostic yield for peripheral lesions is significantly lower than for central ones.

If your nodule is peripheral, your team may recommend CT-guided needle biopsy instead, where a needle is guided from outside the chest using scan images. Your team will decide based on where your lesion sits.

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What are the risks of a bronchoscopy biopsy?

Sore throat, mild hoarseness, and low-grade fever are common afterwards and usually settle within a day or two.

Pneumothorax — air leaking into the space around the lung — is the most significant risk of transbronchial biopsy. A chest X-ray after the procedure checks for this before you are discharged. Most pneumothoraxes are small and resolve on their own.

Bleeding from the biopsy site is usually minor and stops during the procedure itself.

What families ask most often

Will I be awake during the procedure?

Most bronchoscopies are done under conscious sedation — you are relaxed and drowsy but breathing on your own, and most people remember very little afterwards. The throat is numbed with a spray first. Some centres use general anaesthesia. Your team will tell you in advance which they plan to use. Either way, you should not be aware of discomfort during the procedure.

How long will I be in the unit?

The bronchoscopy itself takes around 20 to 45 minutes. Allow two to four hours in total for preparation, sedation, recovery, and a post-procedure chest X-ray. You will need someone to take you home, as sedation means you should not drive that day.

When will the biopsy results be ready?

Histology results from tissue samples typically take seven to fourteen days. If the sample is also sent for TB culture — which is common in India where TB and lung cancer can appear similar on a scan — culture results take several weeks. Your team will give you an appointment to discuss results and will contact you sooner if anything needs urgent attention.

What if the bronchoscopy does not give a clear result?

A non-diagnostic result means the sample did not contain enough tissue, or the scope could not reach the lesion. It is not the same as a clear negative result. NCCN guidance states that a non-diagnostic bronchoscopy in a patient with a suspicious lesion should prompt consideration of a further biopsy by a different route — CT-guided or surgical. Ask your team what the next step would be.

Can bronchoscopy distinguish TB from cancer?

Often yes. Tissue and washings collected during the same procedure can be sent for histological analysis and for TB culture and molecular testing. In India, old TB scars and active TB lesions can produce shadows on a scan that look very similar to cancer. Getting both questions answered from one biopsy avoids the need for a second procedure in many cases.

Did you know?

For endobronchial lesions — growths visible directly inside the airway — NCCN and ESMO guidance describes bronchoscopy as the first-choice biopsy method. A small central tumour beside an airway is often more accessible through the scope than a larger mass sitting at the outer edge of the lung.

Source: NCCN Guidelines for Lung Cancer; ESMO Clinical Practice Guidelines

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Common questions

Frequently asked questions

How does the bronchoscope actually reach the lung?

The scope is a thin, flexible tube passed through your mouth or nose, over the vocal cords, and down into the main windpipe. From there it follows the branching airways, guided by images from your previous scan. The team watches the view live on a screen. Because it moves through the natural airway, no incision is needed and nothing crosses the chest wall.

Is conscious sedation the same as being put to sleep?

No. With conscious sedation, you are relaxed and drowsy but breathing on your own. Most people have very little memory of the procedure. General anaesthesia — being fully asleep with a breathing tube — is used in some centres. Either way, you should not be aware of discomfort. Your team will tell you which approach they plan to use at your pre-procedure appointment.

How likely is bronchoscopy to give a diagnosis?

It depends on where the lesion sits. For growths directly inside the airway, bronchoscopy gives a reliable tissue diagnosis in a high proportion of cases, according to NCCN guidance. For peripheral nodules at the outer edge of the lung, yield is considerably lower and CT-guided biopsy is usually a better choice. Your oncologist can tell you before the procedure whether your lesion is in a location where bronchoscopy is likely to be informative.

What is a pneumothorax and would I know if I had one?

A pneumothorax happens when air leaks from the lung into the surrounding space, causing part of the lung to deflate. A chest X-ray is done after the procedure to check for this before you leave. If you develop sudden chest pain or worsening breathlessness after getting home, go to the nearest emergency department and tell them you had a bronchoscopy that day. Most cases after bronchoscopy are small and settle on their own.

My scan could be TB or cancer. Will bronchoscopy tell us which?

Often yes. Tissue and washings collected during the procedure can be sent for histology and for TB culture and molecular testing at the same time. Old healed TB scars are common in India and can look alarming on a CT scan without representing active disease or cancer. Your oncologist and radiologist will have considered both diagnoses before recommending bronchoscopy, and the biopsy is intended to distinguish between them.

Can I go home the same day?

Yes, in most cases. Bronchoscopy is done as a day procedure. After a recovery period and a chest X-ray, you are discharged. You will need someone else to take you home, as sedation means you should not drive. Your team will let you know in advance if your particular situation means an overnight stay is recommended.

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