A Study of Antibiotic Delivery to Prevent Infection After Breast Tissue Expander Placement

Inclusion Criteria: * Female sex * Aged 18 years or older * Planned to undergo mastectomy for breast cancer, genetic predisposition to and/or strong family history of breast cancer, or other prophylactic indication * Planned to undergo unilateral or bilateral immediate breast reconstruction (i.e., reconstruction at the time of mastectomy) with prepectoral TE placement at MSK * BMI less than 40 kg/m2 * Not actively smoking or using other nicotine products within 6 weeks of surgery * No contraindications to Stimulan antibiotic bead placement: hypercalcemia, severe vascular or neurological disease, uncontrolled diabetes, pregnancy, and severe degenerative bone disease * No known allergy to calcium sulfate, vancomycin, or gentamicin * No impaired decision-making capacity