The researchers are doing this study to find out whether Stimulan Rapid Cure works to reduce the risk of infections in people getting tissue expanders placed during mastectomy. The researchers will also study whether Stimulan Rapid Cure affects the risk of seroma, a possible complication of surgery that involves fluid buildup under the skin.

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

Breast Cancer

Memorial Sloan Kettering Cancer Center supports the international committee of medical journal editors (ICMJE) and the ethical obligation of responsible sharing of data from clinical trials. The protocol summary, a statistical summary, and informed consent form will be made available on clinicaltrials.gov when required as a condition of Federal awards, other agreements supporting the research and/or as otherwise required. Requests for deidentified individual participant data can be made beginning 12 months after publication and for up to 36 months post publication. Deidentified individual participant data reported in the manuscript will be shared under the terms of a Data Use Agreement and may only be used for approved proposals. Requests may be made to: crdatashare@mskcc.org.