- Induction chemotherapy: Patients receive vincristine IV on days 1, 8, and 15 of courses 1-3, oral temozolomide once daily on days 1-5, and carboplatin IV over 4 hours on days 1 and 2. Patients also receive G-CSF SC beginning on day 6 and continuing until blood counts recover. Treatment repeats every 28 days for 4 courses in the absence of disease progression or unacceptable toxicity.