results compared to pre-op scores, pf, ss, and vas scores for back, buttock and leg pain had a significant mean decrease at 6, 12, 24 months post-op (p < 0.05). based on the zcq and vas scores, a success rate of 79% (27.34), 78% (30.38) and 74% (17.23) were achieved at six months, 12 months, and 24 months respectively. conclusions x-stop is a safe and effective treatment for nic that provides m...