Radiation Therapy and Temozolomide Followed by Temozolomide and Poly ICLC in Treating Patients With Newly Diagnosed GBM

RATIONALE: Radiation therapy uses high-energy x-rays to kill tumor cells. Drugs used in chemotherapy, such as temozolomide, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Biological therapies, such as poly ICLC, may stimulate the immune system in different ways and stop tumor cells from growing. Giving poly ICLC after radiation therapy and temozolomide may stop any remaining tumor cells from growing. PURPOSE: This phase II trial is studying how well giving radiation therapy together with temozolomide followed by temozolomide and poly ICLC works in treating patients with newly diagnosed glioblastoma multiforme.