A cell necrosis apparatus includes an introducer with a tissue piercing distal end. An RF electrode device includes a first RF electrode with a tissue piercing distal end, a second RF electrode with a tissue piercing distal end, and a third RF electrode with a tissue piercing distal end. The first and second electrodes each have an exterior non-insulated energy delivery surface and an exterior opposing insulated surface. The first, second and third RF electrodes are deployable from the introducer with the first and second RF electrodes exterior non-insulated energy delivery surfaces facing and surrounding the third RF electrode.