Adjuvant induction chemoradiotherapy: Beginning within 28 days after prior resection, patients undergo radiotherapy to the craniospinal axis 5 days a week for 4 weeks and then conformal radiotherapy to the tumor bed 5 days a week for 2 weeks. Beginning 1 week after the initiation of radiotherapy, Temozolomide is applied to these patients as a chemotherapy drug with a dosage of 75mg/m2, daily. The chemotherapy and radiation are combined as temozolomide is taken 1 hour prior to every fraction of radiotherapy.