A Study of Abemaciclib and Radiation Therapy in People With Metastatic Breast Cancer — StellaPhase 1 — Early testing in a small group of people (usually 20–80) to evaluate safety, determine safe dosage, and identify side effects.
Trial locations(7 sites)
United States
Memorial Sloan Kettering at Basking Ridge (All protocol activities), Basking Ridge, New Jersey Memorial Sloan Kettering Monmouth (All Protocol Activities), Middletown, New Jersey Memorial Sloan Kettering Bergen (All Protocol Activities), Montvale, New Jersey Memorial Sloan Kettering Suffolk-Commack (All Protocol Activities ), Commack, New York Memorial Sloan Kettering Westchester (All Protocol Activities), Harrison, New York Memorial Sloan Kettering Cancer Center (All protocol activites), New York, New York Memorial Sloan Kettering Nassau (All protocol activities), Rockville Centre, New York Last updated February 2026