University of Miami
The purpose of this study is to find the most effective dose of radiation therapy to give to breast tumors in a shorter period of time, prior to standard partial mastectomy/axillary surgery.
Inclusion Criteria: 1. Female, ≥ 50 years of age. 2. Oncotype or MammaPrint diagnosis results are required prior to the start of treatment 3. Histologically confirmed invasive breast cancer. 4. Clinical stage T1N0M0. 5. Receptor status: Estrogen-Receptor (ER)/Progesterone-Receptor (PR) positive and Human Epidermal Growth Factor Receptor 2 (HER2) negative. 6. Unifocal breast cancer. 7. Eastern Cooperative Oncology Group (ECOG) 0, 1. 8. Ability to undergo MRI. 9. Women of child-bearing potential (WOCBP) must agree to use adequate contraception or agree to undergo sexual abstinence prior to stud…
Preoperative SABER: Participants will be treated with an assigned dose level of preoperative SABER, delivered in once a day, 5 fractions given on non-consecutive days, over a period of 2 weeks. In this phase I study, starting with dose level II, a dose level of preoperative SABER will be assigned per study dose-escalation design, treating 2 to 6 patients per dose level. The tested doses are the following: * Dose Level I: 35 Gy (5 fractions of 7 Gy) * Dose Level II (Starting Dose): 40 Gy (5 fractions of 8 Gy) * Dose Level III: 45 Gy (5 fractions of 9 Gy) * Dose Level IV: 50 Gy (5 fractions of 10 Gy)
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