A unipolar electrosurgical instrument that is configured for use in MIS and other electrosurgical procedures, primarily for the treatment of benign and malignant lesions of the upper aerodigestive tract. The instrument is configured to cooperate with the cannula of a laryngo-pharyngoscopes. The shape includes a short proximal section at an angle to a long middle section which leads to an offset working end containing a unipolar electrode. When energized, a unipolar discharge is generated at the working end of the electrode.