Sentinel lymph node biopsy

Pronunciation

Definition 1

Removal and examination of the sentinel node(s) (the first lymph node(s) to which cancer cells are likely to spread from a primary tumor). To identify the sentinel lymph node(s), the surgeon injects a radioactive substance, blue dye, or both near the tumor. The surgeon then uses a probe to find the sentinel lymph node(s) containing the radioactive substance or looks for the lymph node(s) stained with dye. The surgeon then removes the sentinel node(s) to check for the presence of cancer cells. (NCI Dictionary)

Definition 2

Surgical removal and examination of the sentinel node, the lymph node which is first in receiving the lymphatic drainage of a specified anatomic location and is most likely to be affected by the lymphatic spread of cancer. (NCI Thesaurus)

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