A method of marking a biopsy site within living tissue of a host includes providing a marker that incorporates biological tissue for which antibodies can be produced inserting the marker at the biopsy site in the host producing a specific antibody for the biological tissue that is grown and tagged with a radioactive label injecting the specific antibody in the host, the specific antibody concentrating in and about the biological tissue to cause a concentration of the radioactive label in the vicinity of the marker and imaging the radioactive label using a radiation detector.
