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Lymph Node mapping, also known as sentinel lymph node (SLN) mapping is a procedure in which a radioactive tracer and a blue dye is injected around the tumor site. These two substances travel from the tumor and drain into the sentinel, or main, lymph node. Together they provide a marker for the location and presence of a sentinel lymph node, allowing discovery of minute metastases areas. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C18210\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C18210\' NCI Thesaurus)
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