Breast-conserving surgery for breast cancer requires an operating time that is related to the difficulty of the surgery. Breast-conserving surgery requires a portion of the tumor and the surrounding glands to be enlarged, as well as intraoperative cryopathology, which is required before deciding whether to further enlarge or end the surgery. Some breast-conserving procedures still require intraoperative mammaplasty, and the duration of surgery also varies depending on the difficulty of the reconstructive technique. If it is just a simple gland displacement, it may only add 10-15 minutes to the time. But if it is a more complex gland volume transfer or volume replacement surgery that is needed, it may take longer, 2-3 hours is possible. So it’s hard to say exactly how long a breast-conserving procedure will take. Probably the fastest, for example, the simplest surgery, where the cryopathology also comes out relatively quickly and there is no doubt, may be over in an hour. Breast-conserving surgery still requires identification of the axillary lymph nodes, including biopsy of the anterior lymph nodes, and if there is a problem with the anterior, axillary lymph node dissection may also be required, so the time of surgery may increase by 0.5-2 hours.