“…Cell-mediated immunity plays a role in defense against facultative intracellular bacteria (19,32), viruses (34,45), and certain other infectious agents (54, 55) and may be a significant defense against neoplastic growth (48,50). Hyperthermia is associated with certain solid and lymphoid-origin neoplasms (7,30,44) and has been shown to adversely affect neoplastic tissue to a greater extent than it does normal tissue (13,27). This effect of hyperthermia has been reported in tissue culture systems (38,43,51), in experimental animal tumors (15,22,37), and in human tumors (12,25).…”