Study on the Cosmetic Outcome and Safety Evaluation of 3D Printed Biodegradable Biological Mesh for One-Stage Breast Reconstruction After Radical Mastectomy

Inclusion Criteria: * Female breast cancer patients aged 18 to 70 years. * Histopathologically confirmed invasive breast cancer, as defined by the latest ASCO/NCCN guidelines. * Unable to undergo breast-conserving surgery or willing to undergo total mastectomy with immediate implant-based breast reconstruction. * ECOG performance status of 0-1. * Voluntary participation in the study and signing of the written informed consent form. Exclusion Criteria: * Age \>70 years. * Metastatic breast cancer (Stage IV) at initial diagnosis. * Multicentric, extensive, diffuse lesions, or inflammatory breast cancer. * Tumor involvement of the nipple-areolar complex. * Breast cancer during pregnancy. * History of other malignancies within the past 5 years, except for cured cervical carcinoma in situ or non-melanoma skin cancer. * Abnormal function of vital organs such as heart, lungs, liver, or kidneys; poorly controlled diabetes, etc., rendering the patient unable to tolerate surgery. * Patients deemed unsuitable for participation by the investigator.