Optimal Strategies for Autologous Fat Grafting in Breast Augmentation and Reconstruction: A Systematic Review and Network Meta-Analysis.

[BACKGROUND] Cell-assisted lipotransfer (CAL) and platelet-rich plasma (PRP)-assisted lipotransfer have been used to overcome the low survival rate of conventional lipotransfer. However, there is still insufficient evidence to determine which technique is the best strategy for autologous fat grafting in breast cosmetic and reconstructive surgery. The present study aimed to compare the efficacy of traditional fat transplantation, CAL, and PRP-assisted lipotransfer.

[METHODS] A systematic search was conducted in several databases, including PubMed, Web of Science, Cochrane, ClinicalTrials.gov, and Embase, concluding on January 21, 2024, to identify studies that met the inclusion criteria. Twelve studies were included after a rigorous selection process based on predefined criteria. Statistical analyses were conducted using R version 4.0.5 software with the netmeta and dmetar packages, utilizing a frequentist approach with a random-effects model. A network meta-analysis was performed to compare different fat graft procedures with regard to fat survival rate and complication events.

[RESULTS] CAL and PRP-assisted lipotransfer were better than traditional fat grafting in terms of fat survival rate. In addition, there was no significant difference in the incidence of postoperative complications among the CAL, PRP, and traditional groups.

[CONCLUSIONS] Given the results of network meta-analysis, it appears that both CAL and PRP-assisted lipotransfer have a higher fat survival rate for autologous fat grafting in breast augmentation and reconstruction. However, the transplantation strategy still needs to be analyzed based on actual conditions in clinical applications.