The duration of breast cancer surgery varies depending on multiple factors, such as the type of surgery chosen, the surgeon, and the medical institution performing the surgery. Simply put, if a breast-conserving surgery is performed, the operation might only take about half an hour; whereas a typical modified radical mastectomy, which involves removing the entire breast, might take about an hour and a half. If the surgeon is a specialist in a top-tier hospital and performs breast cancer surgeries weekly or even daily, their surgery time is definitely the shortest. Therefore, depending on these factors, the duration can be as short as several tens of minutes to as long as several hours, in the case of reconstructive surgeries where the breast is removed and then reconstructed, which can take six to eight hours. Thus, it cannot be generalized; the duration can be as quick as twenty to thirty minutes or as lengthy as several hours.