1, congenital breast dysplasia; 2, benign breast tumor after simple mastectomy; 3, early childhood breast tissue due to infection, burns, X-ray irradiation, tumor resection caused by the absence of one or both breasts; 4, three years after radical breast cancer surgery, no signs of recurrence; 5, stage I and II breast cancer surgery, urgent requirements for breast reconstruction; 6, patients urgent requirements for breast reconstruction, the main body Breast reconstruction can be considered when there is no organic lesion in the main organs of the body. According to the different causes of breast loss, different timing of surgery can be chosen. If a benign breast tumor is simply mastectomized, reconstructive surgery can be performed at the same time; if the breast loss is caused by mammary gland dysplasia or trauma or burns in early childhood, surgery can be performed at a later time in adulthood; if a malignant breast tumor is radically treated, reconstructive surgery can be performed only after 3-5 years of observation and confirmation that there are no multiple lesions. Surgical method Reconstruction of chest wall deformities and breast defects using autologous tissue grafts. This includes repair of chest wall defects and breast reconstruction using latissimus dorsi flap, rectus abdominis flap or thoracoabdominal flap. Alternatively, breast reconstruction can be performed using skin soft tissue expanders and silicone-encapsulated breast implants. The skin soft tissue expander is implanted under the pectoralis major muscle, and after the incision is healed and stabilized, saline is injected into the expander periodically, every 1-2 weeks, and after 4-8 weeks, the expansion of the breast tissue is completed and maintained for 2-4 weeks, and then the silicone capsule breast prosthesis is implanted. Complications 1. necrosis of skin flap, myocutaneous flap and breast flap; 2. hematoma; 3. infection; 4. asymmetry of both sides and unattractive appearance after breast reconstruction; 5. ventral hernia, scar growth, fibrosis of reconstructed breast, etc. Postoperative care In addition to general surgical care, an elastic bra should be worn for 3 months after surgery to fix the breast and shape the breast, and to reduce the tension of the incision and prevent sagging and deformation of the reconstructed breast.