Hyperthermia has been found to be of great benefit in combination with radiation therapy or chemotherapy in the management of patients with difficult and com plicated tumor problems. It has been demonstrated to increase the efficacy of ionizing radiation when used locally but also has been of help in combination with systemic chemotherapy where hyperthermia is carried out to the total body. Triple modality (thermo-chemo-radiotherapy) or other treatment combinations have not been fully evaluated and may demonstrate extended clinical applications in the future. Problems remain with regard to...