- Stratum I (newly diagnosed disease): Patients receive CISTEM chemotherapy comprising cisplatin IV over 3 hours on day 1 and oral temozolomide once daily on days 2-6. Treatment repeats every 28 days for up to 7 courses. Patients who achieve responsive or stable disease after 2 courses receive 2 more courses of CISTEM chemotherapy and then undergo radiotherapy 5 days a week for 6 weeks. After completion of radiotherapy, patients may receive up to 3 more courses of CISTEM chemotherapy for a total of 7 courses.