Some cancer cells that are irradiated appear to express proteins that promote the body's immune system. Leukopheresis product from HemaCare was key to this immunotherapy research.
Radiotherapy has long been used in the treatment of cancer. By damaging DNA, leading to cellular death, radiation therapy kills cancerous tissue; radiation beams can be sculpted such that normal tissue is largely spared. This type of cancer treatment has been known to be synergistic with chemotherapy.