CT-guided microwave ablation of osteoid osteoma: Long-term outcome in 28 patients - 04/05/22
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Highlights |
• | Microwave ablation (MWA) of osteoid osteoma results in long term efficacy. |
• | After MWA of osteoid osteoma, success at one month predicts long-term recovery with no need for further follow-up. |
• | MWA can be used to treat osteoid osteoma safely, with a 10% incidence of grade B side-effects. |
ABSTRACT |
Purpose |
The purpose of this study was to assess the long-term efficacy of CT-guided microwave ablation (MWA) in the treatment of osteoid osteoma. Secondary objectives were to assess early outcome and side-effects of MWA.
Materials and methods |
Twenty-eight consecutive patients (18 men, 10 women) with a median age of 19.5 years (IQR: 16, 25.5) with a total of 28 non-spinal osteoid osteoma treated by CT-guided MWA were retrospectively included. The ablations were performed with a median power and duration of 60 Watt and 1 min 30 s, respectively. Pain referred to osteoid osteoma was assessed at predefined time points using a 0-10 numeric rating scale. At one month, contrast-enhanced follow-up MRI was performed to evaluate the nidus vascularization and the volume of necrosis induced by MWA. Clinical success was defined by the absence of osteoid osteoma-related pain, and technical success was defined by the presence of necrosis of the nidus on the one-month post-MWA MRI.
Results |
Long term success rate was 93% (26/28) after a follow-up of 55.5 months (IQR: 25.75, 74.5) and technical success rate was 96 % (25/26). One late failure was observed after a patient had been declared cured at one month but the formal proof of a late recurrence of osteoid osteoma could not be brought. Three minor complications were reported including mild reversible superficial radial nerve injury with a skin burn (grade 2) in one patient and moderate skin burn only in two patients.
Conclusion |
Our results suggest that CT-guided MWA is an effective option for a minimally-invasive treatment of osteoid osteoma with a low rate of complication and no late recurrence.
Le texte complet de cet article est disponible en PDF.Keywords : Osteoid osteoma, Microwave ablation, Follow-up studies, Computed tomography, Magnetic resonance imaging
Abbreviations : CT, IQR, MWA, MRI, OO, RFA, SIR
Plan
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