(SNB) Identifies whether or not the first lymph node (or nodes) is clear of cancer cells.
biopsy of a sentinel node (the first lymph node to receive lymphatic drainage from a malignant tumor). It is identified as follows: a dye and a radioactive substance are injected into the body, which causes certain nodes to “light up” like a sentinel, indicating that they are the most appropriate ones for exam...
Type: Term Definitions: 1. biopsy preceded by injection of a dye or radioisotope adjacent to a tumor to identify for excision the primary nodes draining the area; used to determine the presence of lymph node metastasis without removing the entire lymph node basin.
Sentinel node biopsy: See: Sentinel lymph node biopsy.