A single-center, retrospective study was conducted. The electronic medical records of patients who underwent mastectomy between July 2015 and June 2020 in Samsung Medical Center were reviewed. Considering the length of the wound, reducing the skin closure time is more of a concern in mastectomy than in breast-conserving surgery. Therefore, most of the cases in which ASS was used for skin closure were mastectomies, and patients who underwent breast-conserving surgery were not included in this study. Also, patients who underwent breast reconstruction immediately following mastectomy were not included.