What is the main purpose of sentinel lymph node biopsy in breast cancer?

What is the main purpose of sentinel lymph node biopsy in breast cancer?

• A. Determine axillary lymph node status
• B. Exclude liver metastases
• C. Stage distant metastases
• D. Predict tumor receptor status

Answer: (A)

Sentinel lymph node biopsy is done to determine axillary lymph node status by sampling the first lymph node that drains the breast tumor. If this sentinel node has no cancer, most of the remaining axillary nodes are likely clean, so a full axillary dissection can often be avoided, reducing risks like lymphedema and shoulder dysfunction. If metastasis is found in the sentinel node, more extensive axillary treatment is considered to control regional disease and inform prognosis and adjuvant therapy decisions. It does not assess liver or distant metastases—that evaluation relies on imaging and biopsies of distant sites—and it does not predict tumor receptor status, which is determined from the primary tumor’s pathology (ER/PR/HER2).

Sentinel lymph node biopsy is done to determine axillary lymph node status by sampling the first lymph node that drains the breast tumor. If this sentinel node has no cancer, most of the remaining axillary nodes are likely clean, so a full axillary dissection can often be avoided, reducing risks like lymphedema and shoulder dysfunction. If metastasis is found in the sentinel node, more extensive axillary treatment is considered to control regional disease and inform prognosis and adjuvant therapy decisions. It does not assess liver or distant metastases—that evaluation relies on imaging and biopsies of distant sites—and it does not predict tumor receptor status, which is determined from the primary tumor’s pathology (ER/PR/HER2).