The present invention provides compositions and methods for target radiotherapeutic treatment of cancer. Freshly isolated or culture expanded ELA stem cells are loaded with at least one of a diagnostic agent and a therapeutic agent, and the stem cells are then introduced into a subject. The loaded ELA stem cells migrate to location of cancer and form the basis both of diagnostic imaging and of directed Neutron Capture Therapy. Treatment of a subject may include ELA stem cell-based NCT radiotherapy as an adjunct to traditional therapies. An ELA stem cell-based diagnostic preparation can be used directly, or as a further addition to current imaging agents and methods.
