Abstract: The Body Cavity Cancer Treatment System achieves extremely uniform temperatures inside the tissue of the body cavity thereby realizing optimal efficacy in enhancing operation of the chemotherapy agent while avoiding harm or pain to the patient. This is accomplished by the inclusion of “target particles”, such as nano-particles, into the body cavity along with the chemotherapy agent to enable the use of an externally generated energy field to cause heating of the chemotherapy agent and the surrounding tissue of the body cavity by the activation of the nano-particles. The proper selection of the applied energy field enables precise control of the heat generated by the movement of the nano-particles.