Extended Clinical Experience With Nipple-Sparing Mastectomy and Prepectoral Polyurethane Implant Positioning (BRAND4P

Implant breast reconstruction is the most common procedure performed in patients who undergo mastectomy for cancer treatment or prophylactic purposes. Traditional techniques involve total or partial implant coverage with chest wall muscles. This study investigates a less invasive technique that involves polyurethane foam covered implant positioning above pectoralis muscle on a great patients' cohort. Favourable outcomes from a relatively long follow-up encourages the reproducibility of our approach. Background: Direct-to-implant prepectoral breast reconstruction in the last years demonstrated to be a feasible and advantageous method in selected cases because it respects chest wall musculature integrity and avoids anima-tion deformity. Current approaches involve implant wrapping with Acellular Dermal Matrix (ADM) or synthetic mesh to guarantee implant coverage and stability and reduce complications. Prepectoral polyurethane implant position-ing without further coverage is an alternative breast reconstruction method poor described in literature. Patient and Methods: A single-institution retrospective analysis was performed on 453 patients, extending our previous prelim-inary experience, who underwent nipple-sparing mastectomy (NSM) and prepectoral polyurethane implant position-ing between December 2017 and June 2021. Follow-up included postoperative complications record and self-reported patient's satisfaction. Results: A total of 784 mastectomies were performed in 453 patients. 331 were bilateral proce-dures (73.1%) and 122 were unilateral (26.9%). Minimum follow-up time was 6 months and maximum was 42 months. No major complications were reported. Contour defects and excessive implant visibility occurred in 82 patients (18.1%) and was successfully managed with autologous fat grafting. Conclusion: Nipple-sparing mastectomy with immedi-ate prepectoral polyurethane implant reconstruction without the need for ADM or mesh is a feasible and safe option. Accurate patient selection and respectful mastectomy technique is crucial to achieve optimal outcomes with this approach. Fat grafting is a useful refinement procedure to improve cosmetic results in this setting.