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Health Library

Welcome to the comprehensive Health library of Maternal Gynerations. The information shared below is provided to you as an educational and informational source only and is not intended to replace a medical examination or consultation, or medical advice given to you by a physician or medical professional.

What Is Sentinel Node Breast Biopsy?¿Qu© es la biopsia mamaria del ganglio centinela?

What Is Sentinel Node Breast Biopsy?

A sentinel node is the first lymph a tumor drains into. So, it's the first place that cancer is likely to spread. In breast cancer, the sentinel node is usually one of the axillary lymph nodes in the armpit. A sentinel node breast biopsy can be performed at the same time as a lumpectomy or a mastectomy. During the biopsy, one or more lymph nodes are removed. These are sent to the lab to be studied. If there are cancer cells in the sentinel node, this means the cancer has likely spread outside the breast. But if no cancer cells are found in the sentinel node, this means the cancer has probably not spread. A sentinel node biopsy gives the doctors valuable information, with less risk to you than some other procedures.

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How Is the Sentinel Node Found?

There are two methods for finding the sentinel node. Your surgeon may do one or both of these techniques:

  • A blue dye may be injected near the breast tissue. Then, its path into the lymph nodes is tracked. The dye collects in the sentinel node.

  • A small amount of a safe radioactive solution may be injected near the tumor. A gamma detector is then used to find the "hotspot," which is the node where the solution has collected.

Understanding the Risks

Lymph node surgery involves certain risks. Your surgeon can discuss them with you. These include:

  • Infection

  • Bleeding

  • Fluid collection (seroma)

  • Pain or numbness

  • Long-term swelling of the arm (lymphedema)

Publication Source: Veronesi U et al

Online Source: Veronesi U et al

Date Last Reviewed: 2007-01-15T00:00:00-07:00

Date Last Modified: 2005-09-28T00:00:00-06:00


For excellent fertility, obstetrics and gynecology services, visit Maternal Gynerations in Lawrenceville or Dacula. We provide family planning consultations and gynecologic cancer screening. Call 770.513.4000 or visit our Patient Portal to view your account or schedule your consultation with us. Our patients come to us from Dacula, Lawrenceville, Suwanee, Winder and Buford.

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