Regional anesthesia—an area of the body will be numb.
Description of the Procedure
A blue dye, and often a radioactive tracer, will be injected into an area near the tumor. It may be done a few hours before the biopsy. The dye and tracer will travel from the tumor area to the sentinel nodes. This will also help show which nodes are the sentinel lymph nodes.
A small incision will be made. The sentinel node(s) will be removed. The removed node (s) will be checked for cancer cells. If cancer is found, the rest of the lymph nodes in that area will be removed.
If cancer is not seen in the sentinel node, it is unlikely that the cancer has spread to other lymph nodes. The other lymph nodes will not be removed.
How Long Will It Take?
The biopsy takes about 30 to 60 minutes. Surgery to remove the entire cancer takes longer.
Will It Hurt?
There may be some mild pain and discomfort after the biopsy. Medicines can help.
After the biopsy, there may be a short stay at the care center. Many can go home the same day.
The lymph node will be sent to the lab for testing. The biopsy results will determine if more lymph nodes need to be removed. It can also help determine how severe the cancer is.
Most can return to normal activity in a few days.
Call Your Doctor
Call your doctor if you are not getting better or you have:
Signs of infection, such as fever and chills
Redness, swelling, excess bleeding, or discharge from the incision
Redness, warmth, swelling, stiffness, or hardness in the hands or feet
Dark or swollen fingers and toes
Lasting nausea and/or vomiting
Pain that you cannot control with the medicine
Problems breathing or chest pain
New or unexpected symptoms
If you think you have an emergency, call for medical help right away.
Qiu SQ, Zhang GJ, et al. Evolution in sentinel lymph node biopsy in breast cancer. Crit Rev Oncol Hematol. 2018;123:83-94.
Sentinel lymph node biopsy for breast cancer. EBSCO DynaMed website. Available at: https://www.dynamed.com/evaluation/sentinel-lymph-node-biopsy-for-breast-cancer. Accessed September 23, 2021.
Sentinel lymph node biopsy: questions and answers. National Cancer Institute website. Available at: http://www.cancer.gov/about-cancer/diagnosis-staging/staging/sentinel-node-biopsy-fact-sheet. Accessed September 23, 2021.
Sentinel lymph node biopsy. Yale Medicine website. Available at: https://www.yalemedicine.org/conditions/sentinel-lymph-node-biopsy. Accessed September 23, 2021.
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