Lymph nodes are found throughout the body. They are part of the body’s immune system. These nodes help fight infection by making white blood cells. They also work by trapping bacteria, viruses, and cancer cells. Normally, lymph nodes cannot be felt unless they are swollen. Infection, usually by a virus, is the most common cause of lymph node swelling. Other causes include bacterial infection and cancer.
With this type of biopsy, the doctor removes all or part of a lymph node so it can be further examined.
Reasons for Procedure
This biopsy is done to find out why a node is swollen. Swelling may be caused by infection, cancer, or another disease such as
Common areas for biopsy include:
Under the jaw and chin
Behind the ears
Problems from the procedure are rare, but all procedures have some risk. Your doctor will review potential problems, like:
Nerve damage, including numbness at the biopsy site, which usually resolves in a few months
What to Expect
Prior to Procedure
Leading up to your procedure, you will need to:
Talk to your doctor about your medical history, including:
Any allergies that you have
Any medications you take, including over-the-counter drugs and herbs and supplements. You may be asked to stop taking some medications up to 1 week before the procedure.
Arrange for a ride home from the care center.
Avoid eating or drinking anything after midnight if you will have general anesthesia.
Local anesthesia—Just the area that is being operated on is numbed.
is used for open biopsies—General anesthesia blocks pain and keeps you asleep through the procedure.
An open biopsy means removing the lymph nodes through an incision. A cut will be made in the skin. All or part of a lymph node will be removed. After removal, the incision will be closed with stitches and bandaged.
Immediately After Procedure
The sample will be sent to the lab for examination.
How Long Will It Take?
About 30-60 minutes—longer if an ultrasound or CT scan is used
How Much Will It Hurt?
You will have some pain and tenderness after the biopsy is taken. Your doctor may give you pain medication.
Be sure to follow your doctor's
Results will be ready in about a week. Your doctor will tell you if further treatment is needed.
Call Your Doctor
Call your doctor if any of these occur:
Signs of infection, including fever and chills
Nausea or vomiting
Redness, swelling, increasing pain, excessive bleeding, or any discharge from the incision site
New or unexpected symptoms
If you think you have an emergency, call for emergency medical services right away.
Sentinel lymph node biopsy. National Cancer Institute website. Available at: https://www.cancer.gov/about-cancer/diagnosis-staging/staging/sentinel-node-biopsy-fact-sheet. Accessed January 26, 2021.
Testing biopsy and cytology specimens for cancer. American Cancer Society website. Available at: https://www.cancer.org/treatment/understanding-your-diagnosis/tests/testing-biopsy-and-cytology-specimens-for-cancer.html. Accessed January 26, 2021.
EBSCO Information Services is fully accredited by URAC. URAC is an independent, nonprofit health care accrediting organization dedicated to promoting health care quality through accreditation, certification and commendation.
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
To send comments or feedback to our Editorial Team regarding the content please email us at firstname.lastname@example.org. Our Health Library Support team will respond to your email request within 2 business days.