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Sentinel lymph node
Pronunciation
Definition 1
The first lymph node to which cancer is likely to spread from the primary tumor. When cancer spreads, the cancer cells may appear first in the sentinel node before spreading to other lymph nodes. (NCI Dictionary)
Definition 2
The first lymph node that is affected by cancer spread from the primary site. Sentinel lymph node biopsy is part of the staging work-up to determine early metastasis to regional lymph nodes in patients with breast carcinoma or melanoma. (NCI Thesaurus)
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