- Patients with CNS metastases are eligible for enrollment if they have received prior treatment (including radiation therapy, stereotactic radiosurgery, surgical resection) to site(s) of CNS metastatic disease, have no requirement for glucocorticoids, are not taking anticonvulsants, and have no overt evidence of neurological deficit; in addition, radiologic scans performed within < 14 days of study entry should not show evidence of disease progression or peritumoral edema