RATIONALE: Radiation therapy uses high-energy x-rays to damage tumor cells. Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die.

PURPOSE: Phase II trial to study the effectiveness of radiation therapy followed by carmustine in treating patients who have supratentorial glioblastoma multiforme.

OBJECTIVES:

• Determine the overall and progression-free survival in patients with supratentorial glioblastoma multiforme treated with accelerated radiotherapy and conformal stereotactic radiotherapy boost followed by carmustine.
• Determine the short and long-term toxicity of this regimen in these patients.
• Determine the feasibility of this regimen in these patients.

OUTLINE: Patients receive daily accelerated radiotherapy 5 days a week on weeks 1-2. On weeks 3-6, patients receive accelerated radiotherapy 4 days a week (3 days a week on week 6) and conformal stereotactic radiotherapy boost once weekly. Patients then receive carmustine IV over 1-2 hours on days 1-3 every 8 weeks for 6 courses beginning within 1 month after the completion of radiotherapy.

Patients are followed every 3 months for 2 years, every 6 months for 3 years, and then annually thereafter.

PROJECTED ACCRUAL: A total of 76 patients will be accrued for this study within 15 months.

• Drug: carmustine
• Radiation: radiation therapy
• Radiation: stereotactic radiosurgery

DISEASE CHARACTERISTICS:

• Histologically confirmed supratentorial glioblastoma multiforme by surgical biopsy or resection within 5 weeks of study
• Postoperative residual contrast enhancing tumor and resection tumor cavity together no greater than 60 mm in maximum diameter
• No well-differentiated or anaplastic astrocytomas or multifocal glioma
• No tumors originating in the brainstem
• No residual tumor within 10 mm of optic chiasm
• No recurrent glioblastoma multiforme

PATIENT CHARACTERISTICS:

Age:

• Not specified

Performance status:

• Zubrod 0-1

Life expectancy:

• Not specified

Hematopoietic:

• Hemoglobin greater than 9 g/dL
• Absolute neutrophil count greater than 1,500/mm^3
• Platelet count greater than 100,000/mm^3

Hepatic:

• Bilirubin less than 2.0 mg/dL
• SGPT or SGOT less than 2 times normal

Renal:

• Creatinine less than 1.8 mg/dL
• BUN less than 30 mg/dL

Pulmonary:

• Chest x-ray normal OR
• DLCO greater than 60% predicted

Other:

• Not pregnant or nursing
• Negative pregnancy test
• Fertile patients must use effective contraception
• Neurologic functional status 0-3
• No other prior malignancy within the past 5 years except carcinoma in situ of the cervix or bladder, ductal carcinoma in situ of the breast, or nonmelanomatous skin cancer

PRIOR CONCURRENT THERAPY:

Biologic therapy:

• Not specified

Chemotherapy:

• Not specified

Endocrine therapy:

• Concurrent steroids allowed

Radiotherapy:

• Not specified

Surgery:

• See Disease Characteristics

Other:

• Concurrent anticonvulsants allowed