An apparatus for the diagnosis of a biological sample is disclosed. An embodiments of the apparatus includes a probe, a probe head distally connectable to the probe, the probe head further comprising a plurality of electrode elements thereby forming an electrode array where each electrode element is variably actuatable to apply an electrical signal to the biological sample an RF signal source for applying the electrical signal to the electrode array an electrode selector adapted and configured to switch the electrical signal from the RF signal source between the plurality of electrode elements and a detection circuit for analyzing a dielectric property received from the biological sample. Methods and kits for diagnosing a biological sample are also disclosed.
