https://www.cancerresearchuk.org/about-cancer/find-a-clinical-trial/a-trial-looking-magnetic-tracer-find-most-likely-lymph-nodes-melanoma-spread-melamag
A trial looking at a magnetic tracer to find the lymph nodes that melanoma may spread to (MELAMAG)
This trial looked at using magnetic tracers, instead of radioactive tracers, to find sentinel lymph nodes.