Purpose: To describe the outcome of primary spinal cord glioma treated with radiation therapy after surgery and to identify variables predictive of outcome.
Methods and materials: A chart review of 52 patients with a diagnosis of spinal cord non-ependymoma glioma at the Princess Margaret Hospital was conducted. Thirty-two patients (62%) were male and 20 (38%) were female. Median age was 32 years (2-76 years). Median follow-up was 3.7 years (2 months to 27 years). Initial surgical management consisted of biopsy alone in 27 (52%) cases, subtotal resection in 20 (38%) cases, and gross total resection in 5 (10%) cases. All patients received postoperative radiation therapy; median total dose was 50 Gy, given in 25 daily fractions (20-60 Gy). Actuarial survival rates were calculated and the influence of patient-, tumor-, and treatment-related variables on outcome was determined.
Results: Five-year overall, cause-specific, and progression-free survivals were 54%, 62%, and 58%, respectively. Ten-year survivals were 45%, 50%, and 43%, respectively. A total of 29 (56%) patients died during the period of review. For 23 (79%) of these patients, death was cancer specific. Progression of tumor was documented in 28 of 52 (54%) patients. The following factors predicted for improved outcome on univariate analysis: age < 18 years, low-grade histology, and length of symptoms prior to diagnosis > 6 months.
Conclusion: The outcome of patients in this series is consistent with that of other similar published reports. Specific recommendations are made for the management of this tumor.