Fig. 1

Osteoid osteoma in the tibia: a CT axial scan: metallic markers were placed on the patient’s skin. b CT axial scan: Once the trocar reaches the lesion, the needle is removed and a bone biopsy needle is inserted coaxially for sampling to verify the diagnosis. c CT axial scan: Then, the radiofrequency electrode is inserted into the lesion coaxially and an ablation protocol specific for osteoid osteoma is performed. d CT axial scan: Follow-up post trocar removal. Notice the trocar tract, which ends up in the lesion