External beam radiotherapy for primary spinal cord tumors

Area of Science:

• Neurosurgery
• Radiation Oncology
• Oncology

Background:

• Primary spinal cord tumors are rare and challenging to treat.
• Postoperative radiotherapy is a common adjuvant therapy for these tumors.
• Understanding the efficacy and safety of radiotherapy is crucial for patient management.

Purpose of the Study:

• To evaluate the long-term outcomes of patients with primary spinal cord tumors treated with postoperative external beam radiotherapy.
• To compare the efficacy of radiotherapy for different tumor types (ependymoma vs. astrocytoma) and locations.
• To assess the safety profile of radiotherapy in this patient cohort.

Main Methods:

• Retrospective analysis of 32 patients with primary spinal cord tumors treated between 1969 and 1983.
• Patients received postoperative external beam radiotherapy (45-55 Gy) following biopsy or subtotal resection.
• Follow-up data included survival rates, relapse-free survival, and assessment of treatment-related toxicity.

Main Results:

• Five- and ten-year actuarial survival rates were 73% and 50%, respectively.
• Five- and ten-year relapse-free survival rates were 60% and 32%, respectively.
• Ependymomas demonstrated significantly better relapse-free survival (80%) than astrocytomas (40%).
• Tumors involving the cervical spine had significantly lower survival rates (45%) compared to other locations (89%).
• No radiotherapy-related neurological deficits were observed up to 20 years of follow-up.

Conclusions:

• External beam radiotherapy is a safe and effective treatment modality for primary spinal cord tumors.
• Radiotherapy outcomes differ significantly based on tumor histology and location.
• Further research may optimize radiotherapy strategies for improved patient outcomes.