What is Sentinel lymph node biopsy?
A sentinel lymph node is defined as the first lymph node to which cancer cells are most likely to spread from a primary tumor. Sometimes, there can be more than one sentinel lymph node. A sentinel lymph node biopsy is a procedure in which the sentinel lymph node is identified, removed, and examined to determine whether cancer cells are present. A negative result implies that cancer has not yet spread to nearby lymph nodes or other organs. A positive result indicates that cancer is present in the sentinel lymph node and that it may have spread to other nearby lymph nodes and, possibly, other organs.