Breast lumpectomy is a typical surgical example that reflects the combination of minimally invasive techniques and cosmetic surgery in the treatment of diseases. Clinical practice shows that although some breast lumpectomy procedures do not significantly reduce tissue trauma, they have outstanding postoperative mental and psychological recovery that is difficult to achieve with conventional surgery due to their ability to complete a wide range of complex surgical operations through tiny incisions, as well as their low bleeding, fast recovery and outstanding cosmetic effects. So is it safe to use breast lumpectomy for breast cancer or not? In traditional breast cancer surgery, the breast is first removed and then the axillary lymph node dissection is performed. However, one of the methods of breast lumpectomy is to use a combination of plastic surgery liposuction and lumpectomy technology to remove fatty tissue from the armpit by liposuction after injecting expansion fluid into the armpit, followed by lumpectomy to remove the breast or mastectomy to preserve the breast, which completely overturns the traditional surgical procedure. At the same time, only blood vessels, nerves, fibrous connective tissue and lymphatic tissue remain in the axilla after the fat is removed. The lymph nodes are suspended between the connective tissue and blood vessels under lumpectomy and can be easily removed and excised. Breast lumpectomy can achieve the same thoroughness of lymph node removal as conventional surgery and better protection of the intercostal brachial nerve, axillary vein accompanying lymphatics and blood vessels, which not only provides good postoperative cosmetic results but also significantly reduces surgery-related complications. In traditional surgery, the tumor is inevitably squeezed when the breast is first removed. Because of the loose nature of the tumor cells, they are easily shed after squeezing and flow into the vascular system in large quantities, causing dissemination, and most of these vascular systems are converging into the axilla. Although most patients have negative axillary lymph nodes in postoperative pathology, the metastasis of breast cancer is through lymphatic system and blood system. Therefore, the cancer cell dissemination caused by this medical source of extrusion is easy to be ignored, but it is also fatal. In contrast, breast lumpectomy removes the axillary lymph nodes first, thus blocking the veins and lymphatic vessels associated with tumor drainage, and then makes the cancer cells “have no way out” when the tumor is removed, which is theoretically more in line with the principles of malignant tumor surgery.