Period 1997 – 2008
No evaluation for metastasis by pre-operative spinal MRI or CSF collection was done in this period 20. Maximum safe surgical resection was attempted. Post-operative brain and spine MRIs were not routinely obtained. All patients received CSI at a dose of 36Gy with an additional boost to the posterior fossa of 18-24Gy for a total dose of 54-60Gy given in fractions of 1.8Gy five times per week. Patients received maintenance chemotherapy consisting of eight, 21-day cycles of 1.5mg/m2 vincristine on day 1, oral 40mg/m2 prednisone, and 100mg/m2 procarbazine on days 1-10.