Minimally invasive rotary mastectomy is the main treatment for benign breast nodules, but patients still have a lot of concerns, such as can all the masses be removed by rotary mastectomy? If the mass is malignant, will the surgery cause it to spread? Will it affect breastfeeding in the future? The following is an answer to these questions. Can the nodules be removed by minimally invasive rotary knife surgery? In fact, no surgical procedure can guarantee 100% clean removal of the mass or nodule, but in order to reduce the residue, the surgeon will follow the following two points: First, the maximum diameter of the nodule to be treated by minimally invasive rotary incision should not exceed 2.5 cm, and it is easier for such small nodules to be removed with the edges more completely sucked into the knife slot. Secondly, after all the tumors seen on the ultrasound image are removed, the surgeon will make another cut at the top and bottom of the residual surgical cavity (Figure 1, the cavity left after tumor removal) and take out the cut tissue for observation to basically determine whether the removal is clean. (Fig. 1) If the nodule is larger than expected, the surgeon will make a “fan excision” according to the situation. Because the rotary knife can be rotated 360° and can be repositioned back and forth, it can be extended in the left, right, anterior, and posterior directions of the residual cavity to ensure that no residue remains. Does the rotary knife minimally invasive surgery affect future breastfeeding? The microscopic structure of the breast is amazing and is not as fragile as one might think. There are 15 to 20 milk ducts in the human body, and each duct is connected to a lobe at one end, and each lobe is composed of several lobules, each consisting of 10 to 100 vesicles (Figure 2). Damage to some of the lobules does not affect lactation much, and even if one duct is closed, the other ducts can continue to work. (Figure 2) Can minimally invasive surgery with a rotary cutter spread malignant nodules? Some patients worry, “If the pathological examination after minimally invasive surgery confirms that they have a malignant tumor, will the surgery have caused the tumor to spread?” There is no need to worry about this, because the rotary cutter can not only remove benign breast nodules, but also has the function of taking biopsy of malignant tumors. When the nodule is sucked into the rotary cutter, it will be pushed into the long tube at the back and the cutter slot will be sealed up so that the removed tissue will not have any contact with other surrounding tissues. Large-scale clinical studies have also confirmed that minimally invasive rotary knife surgery does not increase the chances of tumor implantation. Can multiple nodules be removed in one operation? Can multiple nodules be removed in one operation? Can multiple nodules be removed only from the larger ones and the smaller ones be kept under observation? This method is not recommended. Because it is difficult for doctors to scan and record these small nodules one by one, and it is not easy to track the development of the disease; moreover, with the interference of the original nodules, it is difficult for doctors to make timely judgment if new nodules appear. Therefore, it is recommended for such patients to have all nodules removed if their nature is more clear. And as long as the nodules can be seen by ultrasound, they can be removed in one minimally invasive surgery without a second operation. Rotational knife minimally invasive surgery is more suitable for dealing with multiple nodules because there is no need to make multiple incisions on the breast and one puncture site can deal with multiple nodules, so patients also do not have to worry about excessive damage.