Objective: In this study our aim is to evaluate the efficacy of radiofrequency ablation of the lateral sacral plexus in patients with refractory sacroiliac joint pain.

Method: This retrospective case series of patients with refractory sacroiliac joint pain presents our first 24 lateral sacral plexus radiofrequency ablation procedures performed with multilesion probe.

Results: Among these 24 cases, pain of 2 (8.33%) patients was not relieved, while this treatment provided 50%> pain relief at 1. month in 15 (62.5%), at 3. month in 18 (75%), at 6. month in 17 (70.18%) patients, and 14 (58.33%) patients continued to benefit from treatment at 12. month.

Conclusion: Lateral sacral plexus ablation in patient with refractory sacroiliac joint pain is effective at least 12 month after radiofrequency.

Keywords: Simplicity 3, refrakter sacroiliac joint pain, lateral sacral plexus