Abstract: The present invention relates to an improved sentinel lymph node localization wire for use in breast cancer patients undergoing nodal staging. A hollow wire having an anchoring hook at the distal end is inserted into the breast tissue through a loading needle. The anchoring hook, through spring action upon release from the loading needle, is embedded in the breast tissue near the location of cancerous cells. The loading needle is then removed and radioactive material may be injected into the tissue through perforations in the localization wire without leaving the needle in the patient or without reinserting the needle. A syringe attachment may be affixed to the proximal end of the hollow wire to facilitate the injection of radioactive material and blue dye for localizing the sentinel lymph node.