NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,779 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

sentinel lymph node
(SEN-tih-nul limf node)
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.