Overview Niraparib in Tumors Metastatic to the CNS Status: Not yet recruiting Trial end date: 2026-12-01 Target enrollment: Participant gender: Summary This research is being done to see how effective the drug niraparib is against cancer that has metastasized to the central nervous system (CNS). - This research study involves the study drug niraparib. Phase: Phase 2 Details Lead Sponsor: Massachusetts General HospitalCollaborator: GlaxoSmithKlineTreatments: Niraparib