A device and method for radiofrequency treatment of tissue is disclosed. The device includes an introducer, a plurality of RF electrodes positionable in a nondeployed state within the introducer, and an electrode advancement element. In the nondeployed state, the RF electrodes are contained within the introducer, and separated from the subject's tissue by a plug which substantially occludes the distal end of the introducer. In the method for RF tissue treatment, the introducer is introduced into the tissue of a subject. The RF electrodes are then positioned in the deployed state when the electrode advancement element advances the RF electrodes through the distal end of the introducer, thereby displacing the plug. The electrode advancement element may be a spring-loaded element, and may be actuated by a triggering device on the introducer. The introducer and the RF electrodes may be scored to enhance their visibility in medical imaging studies such as ultrasound, thereby helping to ensure optimal placement of the introducer and the RF electrodes.