Functional and Psychosocial Outcomes following Innervated Breast Reconstruction: A Systematic Review.

With the incidence of breast cancer, breast cancer survival rates, and prophylactic mastectomies all increasing, efforts to optimize breast reconstruction and improve quality of life are becoming increasingly important. Nerve coaptation has been investigated for its potential to remedy the clinical and psychosocial deficits in newly reconstructed breasts. The purpose of this review is to gauge the efficacy of nerve coaptation during breast reconstruction in creating worthwhile benefits in both objective and subjective dimensions of sensation. Methods: A Prospero registered systematic review was conducted. Databases including PubMed, SCOPUS, and ScienceDirect were screened using search terms "innervation," "breast reconstruction," and "neurotization" and relevant inclusion criteria. Results: Twenty-three studies were found that met parameters for inclusion. We identified studies that assessed DIEP-based reconstruction (7), TRAM-based reconstruction (9), implant-based reconstruction (2), and five studies that looked at a variety of reconstructive modalities. Monofilament testing was the most common modality used to assess sensation, while pain, temperature, and pressure thresholds were assessed more infrequently. Various tools were used to measure psychosocial impacts, including the BREAST-Q. While the methods for evaluation of both aspects of sensation were heterogenous, there was a trend towards improved outcomes with neurotization. Conclusions: The results of this review show promising improvements in clinical and psychosocial outcomes in innervated breasts compared to non-innervated breasts. However, the heterogeneity of studies in the literature indicates that more multi-center studies with standardized methodology including the BREAST-Q, sensory testing and complication analysis are needed to adequately demonstrate the value of neurotization in breast reconstruction.