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Last updated: 02/17/2009
Sentinel lymph node biopsies have a high degree of accuracy, with relatively few false negatives. A negative laboratory report means that there is a greater than 95% chance that the other nearby lymph nodes are also free of cancer.
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The sentinel lymph node is the hypothetical first lymph node or group of nodes reached by metastasizing cancer cells from a tumor.
The concept of the sentinel lymph node is important because of the advent of the sentinel lymph node biopsy technique, also known as a sentinel node procedure. This technique is used in the staging of certain types of cancer to see if they have spread to any lymph nodes, since lymph node metastasis is one of the most important prognostic signs.
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