OUTLINE: This is a dose escalation study. Patients undergo craniotomy with the intent to obtain a complete resection of enhancing tumor. Following maximum tumor removal, iodine I 125 seeds and up to 8 polifeprosan 20 with carmustine implants (Gliadel wafers) are implanted into the resected tumor cavity. Cohorts of 6 patients each receive increasing numbers of Gliadel wafers placed into the tumor cavity. Quality of life is assessed at baseline, then every 3 months, and at tumor progression. Patients are followed monthly until death.