CT-guided radiofrequency ablation for the treatment of osteoid osteoma in femoral neck：preliminary experience in 6 cases / 介入放射学杂志

ABSTRACT

Objective To evaluate the feasibility, safety and efficacy of CT-guided radiofrequency ablation in treating osteoid osteoma located at femoral neck. Methods Six patients with osteoid osteomas in the femoral neck received CT-guided percutaneous radiofrequency ablation. In all patients the main complaint was pain at the hip, and the course of disease varied from one month to 2 years, with an average of 8 months. Under spinal anesthesia the surgery was performed. With the help of CT guidance , a 3.5 to 4.0 mm coaxial drill system was inserted into the nidus, and an osseous access was established, then the bone biopsy needle was used to obtain specimens for pathological examination. Subsequently, a 1.5 to 2.0 cm active tip was introduced through a non-cooled radiofrequency needle into the nidus. Radiofrequency ablation was performed with the therapeutic temperature of 90℃, lasting for 6 minutes. The pain visual analogue scale (VAS) was used to evaluate the clinical effectiveness. The postoperative MRI findings were compared with the preoperative ones. Results Three days after the treatment, different degrees of pain relief was obtained in all patients, and all patients could get out of bed and walked around in one week. Postoperative VSA was significantly decreased (P<0.01). No severe complications occurred during and after the procedure. And no recurrence was seen during the follow-up period. Conclusion For the treatment of osteoid osteoma located at femoral neck, CT-guided radiofrequency ablation is a safe and effective minimally invasive treatment with fewer complications and satisfactory clinical results.