Participants will be asked to receive a glucose infusion (U-13C- glucose intravenous) during routine breast cancer surgery at which time, tumor biopsy samples and blood samples will be collected to be used in research experiments to help provide insight into the metabolic activity of the tumor. The length of time on study for each patient will be three - four weeks including two to three hours for glucose infusion and breast cancer biopsy.
To analyze the metabolic activity of Hormone Receptor Positive (HR+)/Her 2 Negative (Her2-) Breast cancer.