CT-guided percutaneous resection of osteoid osteomas: Early and mid-term follow-up in 38 patients.

Purpose. To evaluate the mid-term outcome following CT-guided percutaneous resection of osteoid osteoma. Materials and methods. 38 patients who had been treated by CT-guided percut aneous resection were included. The mean follow-up of 3.7 years. Early and mid-term outcome and histology were analyzed. Results. Histological samples were adequate in 92 % of cases and a diagnosi s of osteoid osteoma was confirmed in 73.7 % of cases. In 6 cases, the lesi on was not an osteoid osteoma: 2 mucoid cysts, 1 benign fibrous dysplasia, 1 fibromucoid lesion, 1 focal osteochondritis, 1 osteomyelitis. Cure was ac hieved in 84.2 % of patients. Minor transient complications occurred in 23. 7 % of cases. The most serious complications included: 1 intramuscular hema toma, 2 femoral fractures, and 1 case of S. aureus osteomyelytis. Conclusion. This study confirms that CT-guided percutaneous resection of os teoid osteomas is effective and shows that other small lesions can also be treated using this technique.