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Osteoid Osteoma; Surgical Resection and Per-Cutaneous Radiofrequency Thermo-Ablation Outcome Comparison

Background: Oteoid osteoma is a benign bone tumor that affects mainly children and adolescents. Most patients complain of pain as the main symptom, which is usually managed by analgesia. Less commonly, the lesion can lead to bone deformity or restricted mobility. Ultimate treatment of this disease is to remove the lesion surgically, or by the recently adopted, less invasive, per-cutaneous radiofrequency thermo-ablation. Objective of the study: To evaluate the outcome of patients diagnosed with osteoid osteoma treated with either surgical resection or per-cutaneous radiofrequency thermo-ablation (PRT). Methods: Our data were collected during the period from January 2000 to December 2016. A total number of 28 patients who underwent either surgical resection or PRT therapy were included. We evaluated the presence of residuals after treatment, symptomatic relief, recurrence rate, and length of stay at hospital following treatment. Results: Mean age of diagnosis in our patients was 14.7 years (±7.63), and 13 patients (46%) underwent surgical treatment, and 15 had PRT therapy (54%). The presence of post-therapy residuals, symptoms relief, and recurrence rate were not significantly different between the two treatment groups, while median length of stay post-op (surgical = 4 days, PRT = 1 day) was significantly different and favored PRT treatment group (p-value=< 0.001). Conclusion: PRT therapy was shown to be less invasive, safer, and significantly reduced the lengths of stay, which could be a determinant factor in fast recovery to patients and a cost-effective option.