sentinel lymph node biopsy: Definition, Uses, and Clinical Overview
A sentinel lymph node biopsy is a surgical test that removes one or a few “first-draining” lymph nodes from an area near a tumor. Those nodes are examined to look for signs that cancer cells have traveled through the lymphatic system. It is most commonly used in breast cancer and melanoma care, often alongside reconstructive or oncoplastic (cancer + plastic surgery) procedures. It helps clinicians stage disease while aiming to avoid removing more lymph nodes than necessary.