- Stage 1 solid tumor and stage 2 endometrial and ovarian cancer participants with known central nervous system (CNS) metastatic lesions which are symptomatic and/or growing; patients previously treated for these conditions that are asymptomatic in the absence of corticosteroid therapy are allowed to enroll; brain metastasis must be stable for 1 month with verification by imaging (brain MRI completed at screening demonstrating no current evidence of progressive brain metastases); CNS imaging will not be mandated for asymptomatic patients with no history of CNS metastases