4. Participants with brain metastases will be eligible if they have undergone complete surgical excision and are more then 1 month post surgery with no radiographic evidence of disease recurrence in the brain or have undergone stereotactic radio surgery (gamma knife procedure) and are more then 1 month post procedure and with no radiographic evidence of disease progression in the brain; and are asymptomatic, and discontinued corticosteroid treatment at least 30 days prior starting treatment.