• Arch Orthop Trauma Surg · Dec 2012

    Percutaneous CT-guided radio-frequency ablation of osteoid osteoma of the foot and ankle.

    • Kiriakos Daniilidis, N Martinelli, G Gosheger, S Hoell, M Henrichs, B Vogt, J Hardes, and V Vieth.
    • Department of General Orthopaedics and Tumororthopaedics, University Hospital, 48149 Muenster, Germany. Kraj@gmx.net
    • Arch Orthop Trauma Surg. 2012 Dec 1;132(12):1707-10.

    IntroductionPercutaneous radiofrequency ablation (RFA) has been considered, in recent years, the standard treatment for osteoid osteoma (OO) of the appendicular skeleton. The variable clinical presentations in the foot and ankle pose problems in diagnosis, localization and thus treatment. The aim of this study was to assess the efficacy of RFA for patients with osteoid osteoma of the foot and ankle.Materials And MethodsA total of 29 patients (22 males, 7 females; mean age 16.7 years; range 8-44 years) with OO of the foot and ankle (distal tibia, n = 17; distal fibula, n = 6; talus, n = 3; calcaneus, n = 3) were enrolled in the study. A CT-guided RFA was performed, using a cool-tip electrode without the cooling system, heating the lesion up to 90 °C for 4-5 min. Clinical success, assessed at a minimum follow-up of 1 year, was defined as complete or partial pain relief after RFA. Pain and clinical outcomes were scored pre-operatively and at the follow-up with a visual analogue scale (VAS) and with the American Orthopaedic Foot and Ankle Society (AOFAS) score. Complications and local recurrences were also recorded.ResultsClinical success was achieved in 26 patients (89.6 %). After RFA, mean VAS and AOFAS score significantly improved from 8 ± 1 to 2 ± 1 (p < 0.05) and from 60.7 ± 12.7 to 89.6 ± 7.1 (p < 0.05), respectively. Two patients experienced partial relief of pain and underwent a second successful ablation. Local recurrences were found in three patients, always associated with pain. These underwent conventional excision through open surgery. No early or late complications were detected after RFA.ConclusionCT-guided RFA of foot and ankle osteoid osteoma is a safe and effective procedure, showing similar results for the rest of the appendicular skeleton.

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