Melanoma may metastasize in less radioactive sentinel lymph nodes

Microscopic melanoma metastases may occur in lymph nodes other than the hottest node, thus warranting their removal, according to results of a single-institution study.Standard of practice ranges in the surgical removal of sentinel lymph nodes, from removal of only the hottest — or most radioactive — lymph node, to removal of all lymph nodes with radioactivity greater than 10% of the hottest lymph node.