presence of abnormal tissue masses in the breast and determine probability of tumors containing malignant cancer cells being present in a breast the device has the capability of providing the location of the abnormality at least to the quadrant the method for measuring electrical characteristics includes placing electrodes and applying a voltage waveform in conjunction with a current detector a mathematical analysis method is then applied to the collected data which computes spectrum of frequencies and correlates magnitudes and phases with given algebraic conditions to determine mass presence and type application_number US 87419210 A description the amplitude and phase of several harmonics within a range of frequencies creates a signature of the breast growths allowing differentiation of benign and malignant masses our invention is novel in that it differentiates normal from abnormal tissue based on observing secondary effects of changes in dielectric properties due to increased numbers of cells based on phase and amplitude of multiple levels of harmonics without the necessity to measure absolute capacitance and resistance values the invention allows differentiation of benign masses e g tumor or infections versus malignant masses versus other cellular changes our approach is not impacted by patient to patient differences other impedance related approaches e g those referenced above from mirabel medical systems biofield and davies depend on measuring absolute capacitive and absolute resistive properties to compute the cole cole function shape measuring absolute.