# Analysis of Postoperative Outcomes in Unilateral Versus Bilateral DIEP Flap Reconstructions: A Single-Center Retrospective Study

## TL;DR

This study compares outcomes of unilateral and bilateral DIEP flap breast reconstructions, finding similar complication rates despite longer surgery times and hospital stays for bilateral procedures.

## Contribution

The study provides new insights into the comparative safety and outcomes of unilateral versus bilateral DIEP flap reconstructions based on a single-center retrospective analysis.

## Key findings

- Bilateral DIEP flap procedures had significantly longer operative times and hospital stays compared to unilateral procedures.
- There were no significant differences in complication rates between unilateral and bilateral reconstructions.
- Chemotherapy was more common in patients undergoing bilateral reconstructions.

## Abstract

Background/Objectives: The DIEP flap is among the preferred techniques in autologous breast reconstruction due to better long-term outcomes, including higher satisfaction and more natural breast shape compared to implant-based breast reconstruction. With the rise in genetic testing, bilateral DIEP reconstructions are becoming more common, though they carry a higher risk of complications. This study aims to compare the risks between unilateral and bilateral procedures to improve surgical decision-making. Methods: A retrospective, single-center review was conducted on female patients who underwent DIEP flap breast reconstruction between January 2018 and May 2024. The study included patients with complete medical records and follow-up data, excluding those with incomplete records. Patient characteristics, operative details, and complications were thoroughly analyzed, with donor site complications assessed per patient and recipient site complications per breast. Results: During the study, 141 DIEP flaps were performed on 114 women, with 87 unilateral and 27 bilateral reconstructions. Age and BMI were similar between groups. However, chemotherapy was more common in the bilateral group (85% vs. 47%, p = 0.0011). Operative time was significantly longer in bilateral procedures (650 vs. 460 min, p < 0.0001). There were no statistically significant differences in recipient and donor site complications across groups. The hospital stay was significantly longer in the bilateral group (11 vs. 8.8 days, p = 0.024). Conclusions: Bilateral and unilateral DIEP flap breast reconstructions have similar complication and early take-back rates.