- Patients with known brain metastases are eligible providing the brain metastases are, in the opinion of the site investigator, asymptomatic or clinically stable after treatment with surgery and/or radiation therapy; patients should not require steroids or antiseizure medications and should have fully recovered from all therapy; at least two weeks should elapse between completion of any treatment for brain metastases (surgery, CNS irradiation) and commencement of protocol therapy