Sentinel Lymph Node Biopsy in Cancer Surgery

Sentinel lymph node biopsy is a surgical procedure used to determine if cancer has spread beyond the primary tumor. During the procedure, healthcare providers inject a radioactive tracer or blue dye near the tumor, which travels to the sentinel nodes, the first lymph nodes where cancer would spread. According to Cleveland clinic “the results help providers determine the most appropriate treatment” (No author). This technique is most commonly used for breast cancer and melanoma patients.

The need for this biopsy arises when cancer cells may break away from the primary tumor and spread through the lymphatic system. Lymph nodes act as filters in the immune system, trapping harmful substances including cancer cells. Mayo Clinic explains that “the sentinel nodes are the first few lymph nodes to which cancer spreads” (no author). If cancer is detected in these nodes, it indicates the disease may have spread further, requiring more aggressive treatment. 

Treatment involves surgical removal of one or more sentinel nodes for lab analysis under anesthesia. Surgeons make a small incision to access and remove the marked nodes, which pathologists then examine microscopically for cancer cells. If the sentinel nodes test negative for cancer, additional lymph node removal is usually unnecessary, sparing patients from more extensive surgery and reducing the risk of complications like lymphedema, a condition where fluid builds up, causing swelling and pain. However, positive results indicating cancer presence may require removal of additional lymph nodes and modified treatment plans including chemotherapy or radiation. Recovery time varies by individual, but most patients can return home the same day following the procedure. They typically resume normal activities within several weeks, though exercising and heavy lifting should be avoided during initial healing. This makes lymph node biopsy an effective, low-risk diagnostic tool that provides crucial information while minimizing surgical intervention in modern cancer care. 

Written by Malak Ibrahim at Incisionary

References:

Cleveland Clinic. (2023, September 8). Sentinel node biopsy. https://my.clevelandclinic.org/health/diagnostics/9192-sentinel-node-biopsy

Mayo Clinic. (2024, October 31). Sentinel node biopsy. https://www.mayoclinic.org/tests-procedures/sentinel-node-biopsy/about/pac-20385264

Saint John's Cancer Institute. (n.d.). Sentinel lymph node biopsy.https://www.saintjohnscancer.org/melanoma/treatment/sentinel-lymph-node-biopsy/