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Medical Term:

sentinel lymph node


the first lymph node to receive lymphatic drainage from a malignant tumor; the sentinel nodes are identified as the first to take on a radionuclide or dye injected into the tumor; increasingly used in operations for melanoma and breast cancer; if the sentinel nodes are free of metastasis, more distal nodes are usually also free.

Synonym(s): sentinel gland, sentinel node

See Also: signal lymph node

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.