Exploring the Role of Autologous Fat Grafting in Implant-Based Breast Reconstruction: A Systematic Review of Complications and Aesthetic Results.

: Hybrid breast reconstruction (HBR), combining implant-based breast reconstruction (IBR) with autologous fat grafting (FG), has emerged as a promising solution to improve aesthetic outcomes and reduce complications, especially in irradiated patients. This study aims to systematically review current evidence on the outcomes of HBR with a focus on complication rates and aesthetic satisfaction. : A systematic literature search was performed in March 2023 using PubMed and Embase databases. Studies were selected based on predefined PICOS criteria, including adult female patients undergoing IBR with FG. Sixteen studies met the inclusion criteria. Data on patient demographics, surgical techniques, fat grafting timing, complications, and aesthetic outcomes were extracted and analysed. : A total of 730 patients were included, with a mean follow-up of 20.23 months. The overall complication rate was 9%, with fat necrosis being the most common (2.7%). Capsular contracture occurred in 4.5% of cases. Immediate fat grafting during implant placement showed the lowest complication rate (8%) compared to delayed or staged procedures. Aesthetic satisfaction was high, with an average score of 4.4 out of 5 in five studies. Fat grafting improved skin quality and contour, especially in irradiated patients, and enabled the use of smaller implants. No oncological recurrences were reported. : HBR is associated with high aesthetic satisfaction and a low rate of complications. Immediate fat grafting during IBR appears to be the safest and most effective approach. These findings support the wider adoption of HBR, though further high-quality studies are needed to validate long-term safety and outcomes.