A device for radio frequency ablation (RFA) of diseased tissue, comprising:- a mesh or plate (100) with a grid of holes (101) for holding electrodes (501 ... 510)- a plurality of electrodes (501 ... 510) with adaptable active tip length- means for visualizing and probing insertion depth of each of the electrodes in the diseased tissue- a switch box, connectable to the electrodes (501 ... 510) and adapted to distribute current between the electrodes (501 ... 510) during the radio frequency ablation (RFA) process- a control unit for controlling the switch box and- means for monitoring (1700, 1800) the radio frequency ablation (RFA) process.
