A Study of Surgery and Radiotherapy in People With Breast Cancer — StellaPhase 2 — Testing in a larger group (up to a few hundred people) to further evaluate safety and begin to assess effectiveness.
Trial locations(7 sites)
United States
Memorial Sloan Kettering at Basking Ridge (Limited Protocol Activities), Basking Ridge, New Jersey Memorial Sloan Kettering Monmouth (Limited Protocol Activities), Middletown, New Jersey Memorial Sloan Kettering Bergen (Limited Protocol Activities), Montvale, New Jersey Memorial Sloan Kettering Suffolk-Commack (Limited Protocol Activities ), Commack, New York Memorial Sloan Kettering Westchester (Limited Protocol Activities), Harrison, New York Memorial Sloan Kettering Cancer Center (All protocol activites), New York, New York Memorial Sloan Kettering Nassau (Limited protocol activities), Rockville Centre, New York Last updated February 2026