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Definition of Sentinel lymph node

Sentinel lymph node: The first lymph node to receive lymphatic drainage from a tumor. The sentinel node for a given tumor is found by injecting a tracer substance around the tumor. This substance then travels through the lymphatic system to the sentinel node. The tracer subst

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=7799
Last Editorial Review: 3/30/2012

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