Thermal ablation of spinal osteoid osteomas close to neural elements: technical considerations

Area of Science:

• Orthopedic Surgery
• Neurosurgery
• Interventional Radiology

Background:

• Osteoid osteomas are benign bone tumors that can cause significant pain, particularly spinal osteoid osteomas.
• Spinal osteoid osteomas located near neural elements present a surgical challenge due to the risk of neurological damage.

Purpose of the Study:

• To evaluate the efficacy and safety of thermal ablation for spinal osteoid osteomas.
• To assess the management of these tumors when located close to neural structures.

Main Methods:

• A retrospective review of 17 patients with spinal osteoid osteomas treated with thermal ablation (laser or radiofrequency) between 1993 and 2008.
• Utilized special thermal protection techniques, including epidural injection of gas or cooled fluid.
• Pain levels were assessed pre- and post-procedure, with long-term follow-up for 11 patients.

Main Results:

• Seventeen patients (mean age 25.9 years) with spinal osteoid osteomas in various regions (lumbar, thoracic, cervical, sacral) were treated.
• Lesions averaged 8.8 mm in diameter and were located a mean of 4.3 mm from neural elements.
• All patients reported immediate pain relief, and 11 patients experienced continued pain relief during long-term follow-up, with no complications.

Conclusions:

• Percutaneous thermal ablation is a safe and effective treatment for spinal osteoid osteomas, even those adjacent to neural elements.
• The use of specialized thermal protection techniques enhances safety during the procedure.