A system for use of electrical resonant frequencies in analyzing and treating abnormality of human and animal tissue includes elements for generating an EM wave having a selectable ratio of capacitance to inductance, modulated in a selectable electrical resonance (ER) frequency relative to the tissue, the tissue to be treated across an EM spectrum of between about 10 Hz and about 500 MHz; elements for measuring resultant ER phases and peaks of a responsive signal emitted by the tissue, in which each peak represents a potential in-phase or out-of-phase ER relative to an established normal phase of such tissue, each ER defining a waveform in which out-of-phase ER is associated with a tissue abnormality; and elements for delivery and applying to the tissue a waveform substantially inverse to that of out-of-phase waveforms to decrease or nullify ER peaks associated with the abnormality of tissue.