A colloid formulation of rhenium sulfide that is labeled with the gamma-emitting epitope technetium Tc 99m (Tc-99m) with diagnostic imaging activity. Upon administration, the 99mTc-colloidal rhenium sulfide is taken up by the lymph nodes. This allows imaging of the lymphatic drainage pattern during sentinel lymph node mapping, also known as lymphoscintigraphy. Check for active clinical trials using this agent. (NCI Thesaurus)
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