Cryoablation of osteoid osteomas: Is it a valid treatment option?

Figure 2 Twenty-four-year-old male-osteoid osteoma of the L4-L5 facet joint. A: Computed tomography axial image L4-L5 facet joint osteoid osteoma; B: Placement of the cryoprobe at an extraosseous position; C: Placement of a thermocouple near the nerve root for temperature monitoring. Spinal needle at the same level for epidural dissection and active warming; D: Iceball visualization as hypodense area covering the entire lesion.