ABSTRACT
Evaluate the efficacy of Image Intensifier- guidance percutaneous ablation of osteoid osteoma of lower extremity in children and adolescents, using a dynamic hip-screw [DHS] drill pit [9- mm] as a minimally invasive therapy. Orthopaedic department at Jordan University Hospital -Amman. The Study Started from November 1999 October 2006, Treating 18 children, [eleven males and seven females], with a mean age of 12.17 years [range 4-16 years]. The mean follow-up period was 35.37 months [range 18-78 months]. There were fourteen lesions in the femur and four in the tibia. All patients were treated percutaneously under Image intensifier guidance by the first author under general anesthesia. Initial clinical success in the first week was achieved in 88.88% of children [16/18] from drilling once. Two patients 11.11% needed redrilling two weeks later after failure of the first drilling to target the nidus. Complications included one fractured tibia and two skin abrasions over the tibia. At long- and medium term follow-up, all patients were classified to have good clinical response. The combination of intraoperative localization of osteoid osteoma by image intensifier, using a dynamic hip-screw [DHS] drill, resulted in an efficient, safe, and curative procedure with minimal bone loss. This method can be used as an alternative to the standard techniques for removal of osteoid osteoma. Using the technique for the tibia may be associated with higher incidence of complications