A Lymph Node Biopsy is used to take a small sample of tissue from an enlarged or swollen lymph node, usually located in the neck, armpit, or groin.
About this scan
Common Indications for Lymph Node Biopsy
Your doctor may request this procedure to:
- Determine why a swollen lymph node isn't going away.
- Check for an infection or an immune system condition.
- See if cancer cells have spread from another part of the body into the lymphatic system.
Will it be painful?
The numbing medicine handles any sharp pain. You will feel some pressure while the sample is taken, and the area might be slightly tender for a day or two.
Before your appointment
Do I need to prepare?
Usually, you can eat and drink as normal. You must tell your doctor if you are taking blood thinners, as you might need to stop them for a few days.
During the scan
What happens during the procedure?
You will lie down comfortably. The doctor uses an ultrasound machine to display a live video of the lymph node on a monitor. This ensures they can navigate safely around any nearby blood vessels. After the skin is completely numbed, a needle is guided directly into the node to snip out a tiny piece of tissue.
How long does it take?
The procedure takes about 20 to 30 minutes. You may be asked to stay in the waiting area for a short time afterward just to ensure you are feeling well.
Safety and special situations
What are the important limitations and safety checks?
Interventional radiology is minimally invasive, but it is not risk-free and is not automatically safer or more effective than surgery, endoscopy, medicines, or observation for every patient. Technical success does not always produce symptom relief or cure disease, and repeat treatment or another approach may be needed. Suitability depends on anatomy, disease severity, comorbidities, imaging, local expertise, and the alternatives available.
Risks vary by procedure and may include pain, bleeding, infection, contrast reaction, kidney injury, radiation exposure, vessel or organ injury, clotting, device movement or blockage, sedation complications, treatment failure, and an unplanned operation or admission. Tissue sampling can be nondiagnostic and requires pathology; tumor treatments require oncology follow-up. The consent discussion should cover the patient-specific benefits, material risks, alternatives, and what happens if the procedure cannot be completed.
Preparation is individualized. Give the team a complete list of anticoagulants, antiplatelet drugs, diabetes medicines, supplements, allergies, kidney problems, pregnancy possibility, and prior contrast reactions. Do not stop a blood thinner or diabetes medicine on your own: the procedural team and prescribing clinician must balance bleeding against thrombosis or metabolic risk and provide exact written instructions. Fasting, laboratory tests, antibiotics, sedation, escort, admission, and aftercare differ by procedure.
Sources and summary
Sources and further reading
Conclusion
An image-guided lymph node biopsy is a very safe and accurate alternative to surgically removing the entire node. It quickly provides the crucial information your doctors need to guide your care.