The female breast is composed of skin, fibrous tissue, mammary glands and fat. Breast cancer is a malignant tumor that occurs in the glandular epithelial tissue of the breast. Ninety-nine percent of breast cancers occur in women and only 1% in men. Breast cancer is a common clinical malignancy, and the global incidence of breast cancer has been on the rise since the late 1970s, which may be related to environmental and dietary factors. Breast-conserving surgery] For patients who want to undergo breast-conserving surgery, they need to pay attention to these points: 1. It must be a single lesion. It does not mean that the lesion occurs in several quadrants of the breast at the same time, but it is possible to preserve the breast if it occurs in two localized lesions in the same quadrant, but most of them are suitable for a single lesion; 2. There is no extensive malignant calcification. If there is a large area of sand-like calcification on the mammogram, this is also a contraindication to breast-conserving surgery; 3. The tumor should not be too large, if the size of the average Asian breast, the tumor generally does not exceed 3 cm, but if the breast itself is large, there can be some relaxation in size. If you cut off too many glands, it is difficult to ensure that the shape of the breast can be restored after surgery, so if the tumor is too large, it is not suitable for breast conservation. Breast reconstruction] The methods of breast reconstruction after breast cancer, whether it is partial reconstruction or total reconstruction, are basically divided into three categories: 1) methods that require prosthesis implantation, that is, artificial materials; 2) methods that use all autologous tissues; 3) methods that may require both artificial prosthesis and autologous tissues.