Study Purpose: This study is exploring a new medicine called PF-07220060 combined with fulvestrant to treat advanced or metastatic breast cancer. Advanced cancer is hard to cure, and metastatic cancer has spread to other body parts. This study compares this combination to the doctor's choice of treatment.
Who Can Join: Adults (18+) with hormone receptor (HR)-positive and HER2-negative breast cancer that has progressed after previous treatments can join. Participants should not need medications that the study doesn’t allow and should be free of medical or mental conditions that may increase risks.
Study Details: Participants will receive treatment until their cancer worsens, the study doctor decides the treatment is not helpful, side effects are too severe, or they choose to stop. Half will take PF-07220060 and fulvestrant, while the other half will receive either fulvestrant alone or a combination of everolimus and exemestane.
- Duration: Participants stay until certain conditions occur, like cancer worsening.
- Visits: Regular scans like MRI or CT will monitor cancer progression.
- Risks: Be aware of potential side effects, which are reactions to medicines.