The influence of contralateral breast augmentation on the development of complications in direct-to-implant breast reconstruction.

[BACKGROUND] Simultaneous contralateral augmentation in direct-to-implant (DTI) breast reconstruction may increase the risk of skin flap necrosis on the reconstruction side due to increased tension on the skin flap when implants are larger than the original breast size. The purpose of this study was to evaluate whether the contralateral augmentation procedure affects complications in unilateral DTI breast reconstruction.

[METHODS] Patients who underwent immediate unilateral DTI breast reconstruction from January 2013 to July 2017 were included in this study. Data were collected through retrospective review of individual medical records. The primary outcome variable was the development of perioperative complications including skin flap necrosis. Univariable and multivariable logistic regression analyses were performed to identify risk factors for complications.

[RESULTS] A total of 121 patients who underwent unilateral immediate DTI breast reconstruction were included in this study. Twenty-one patients (17.4%) underwent simultaneous contralateral augmentation mammoplasty and 100 patients (82.6%) underwent DTI without contralateral augmentation. Overall complications were not different between the contralateral augmentation and no-augmentation groups (23.8% vs. 31%, respectively, p = 0.512). The frequency of skin flap necrosis in the augmentation group (14.3%) was not significantly different from that in the no-augmentation group (18.0%, p > 0.999). In multivariable analysis, mastectomy weight was the only predictor for complications (p = 0.053) and contralateral augmentation was not associated with development of complications.

[CONCLUSION] Contralateral breast augmentation in DTI breast reconstruction is not a risk factor for complications and can be safely performed in selected patients.