A method of inducing hyperthermia in at least a portion of a target area--e.g., a tumor or a portion of a tumor or targeted cancerous cells--is provided. Targeted RF absorption enhancers, e.g., tumor infiltrating lymphocytes (TILs) containing RF absorbing particles, are introduced into a patient. These targeted RF absorption enhancers will target certain cells in the target areas and enhance the effect of a hyperthermia generating RF signal directed toward the target area. The targeted RF absorption enhancers may, in a manner of speaking, add one or more RF absorption frequencies to cells in the target area, which will permit a hyperthermia generating RF signal at that frequency or frequencies to heat the targeted cells.