Image-guided hypo-fractionated stereotactic radiosurgery to spinal lesions

Area of Science:

• Neurosurgery
• Radiation Oncology
• Medical Imaging

Background:

• Spinal tumors and vascular malformations often present treatment challenges, especially when unresectable.
• Traditional treatments may involve invasive procedures or may not be suitable for all spinal lesions.
• Advancements in image guidance and robotic technology offer new therapeutic possibilities.

Purpose of the Study:

• To demonstrate the technical feasibility of noninvasive treatment for unresectable spinal lesions.
• To evaluate image-guided frameless stereotactic radiosurgery for spinal vascular malformations and tumors.
• To assess the safety and preliminary efficacy of this novel radiosurgical approach.

Main Methods:

• Utilized a frameless, image-guided robotic radiosurgery system (CyberKnife) for spinal treatments.
• Treated 16 patients with diverse spinal lesions, including tumors and vascular malformations.
• Employed skeletal landmarks or fiducial markers for precise targeting, delivering high radiation doses in few fractions.

Main Results:

• Achieved high precision, with treatment dose alignment within +/-1 mm of the target volume.
• No disease progression observed in tumor patients with at least 6 months of follow-up.
• No complications reported in any treated patients to date, indicating a favorable safety profile.

Conclusions:

• Image-guided robotic radiosurgery is a technically feasible approach for treating previously untreatable spinal lesions.
• The frameless stereotactic radiosurgery system provides accurate and safe noninvasive treatment for complex spinal conditions.
• This modality represents a significant advancement in managing challenging spinal pathologies.