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Safety Profile and Predictors of Aesthetic Outcomes After Prepectoral Breast Reconstruction With Meshed Acellular Dermal Matrix.

INTRODUCTION: Prepectoral acellular dermal matrix (ADM)-assisted breast reconstruction has demonstrated improved pain scores, faster return to full range of motion, and an appropriate postoperative safety profile when compared with cohorts with submuscular implant placement; however, there are limited data on aesthetic outcomes. Basic science biointegration research has previously demonstrated faster ADM incorporation with fenestrated compared with confluent ADM. We report the safety profile of anterior support meshed ADM prepectoral breast reconstruction and analyze predictive factors for aesthetic outcomes after gel implant placement.

METHODS: All consecutive immediate staged prepectoral expander-to-implant breast reconstructions with more than 6 months of follow-up were compared with a partially submuscular cohort for demographics, comorbidities, and postoperative complications. All patients 1 to 3.5 years after gel implant placement were evaluated for the impact of clinical characteristics on aesthetic outcomes.

RESULTS: Two hundred twenty-four prepectoral tissue expander placements were compared with 535 partially submuscular tissue expanders with no significant differences in demographics. There was increased wound dehiscence repaired in clinic and insignificantly decreased seromas with prepectoral expander placement. One hundred sixty breasts were reconstructed with gel implants, and 12 underwent autologous reconstruction during the conduct of the study. The remaining 21 patients were continuing expansion, and 3 succumbed to disease progression. Regression analysis of 86 breast reconstructions showed that a body mass index of greater than 30, fat grafting, and highly cohesive anatomic implants decreased rippling, whereas radiation increased capsular contracture (P < 0.05).

CONCLUSIONS: Prepectoral meshed ADM breast reconstruction has an equivalent safety profile to partially submuscular ADM-assisted reconstruction and early aesthetic ratings comparable with other published accounts of implant-based reconstruction. Radiated skin envelopes carry higher capsular contracture rates. Thin patients have a higher risk of visible rippling, whereas fat grafting and higher cohesivity implants are associated with less rippling.

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