Overview Palbociclib In Progressive Brain Metastases Status: Recruiting Trial end date: 2025-09-01 Target enrollment: Participant gender: Summary This research study is studying palbociclib as a possible treatment for recurrent brain metastases. - Pfizer, a pharmaceutical company, is supporting this research study by providing the study drug as well as funding for research activities Phase: Phase 2 Details Lead Sponsor: Massachusetts General HospitalCollaborator: PfizerTreatments: Palbociclib