An ablation device and a method of ablating a tissue are provided. The ablation device includes a tubular member having a proximal portion, a distal portion, a lumen extending at least partially therethrough and a conductive portion. The tubular member has a first configuration and a second configuration. The ablation device includes a distal cap operably connected to the distal portion having a diameter that is smaller than a diameter of a distal end portion of an endoscope and a proximal ring connected to the proximal portion having a diameter greater than a diameter of the distal end portion. The ablation device also includes a first catheter operably connected to the distal cap and a second catheter operably connected to the proximal ring, where the proximal ring is movable relative to the distal cap to move the tubular member between the first configuration and the second confirmation.
