A 3D-Printed External Breast Prosthesis for the Improvement of Patient-reported Outcomes Among Breast Cancer Patients That Underwent a Mastectomy Without Reconstruction

Inclusion Criteria: * Adult individuals aged 18 years or older * History of unilateral or bilateral mastectomy for any indication * No implant or autologous reconstruction * Allowed: Goldilocks closure, flat closure, simple skin closure * Willingness to participate in the study by completing PRO assessments or receiving personalized 3D-printed breast prostheses * Ability to provide informed consent * Ability to complete study procedures, including surface scanning (with temporary fiducial skin markers), standardized photography, and surveys at 1, 3, 6, and 12 months Exclusion Criteria: * Individuals with contraindications for participation, such as severe medical conditions that may interfere with study procedures * Lack of willingness or capacity to provide informed consent for study participation * Inability to communicate effectively in the study language (e.g., English) * Patients with open wounds, active infection, or dermatologic conditions at the chest/breast site that would interfere with scanning, fiducial marker placement, or prosthesis use * Patients unwilling or unable to undergo surface scanning, standardized photography, or complete survey follow-up