Capsular contracture in the modern era: A multidisciplinary look at the incidence and risk factors after mastectomy and implant-based breast reconstruction.

[BACKGROUND] Capsular contracture causes pain, poor cosmesis, and reoperations. This study analyzes its incidence and risk factors in a more modern treatment era.

[METHODS] Patients undergoing mastectomy with implant reconstruction from 2010 to 18 were reviewed. Univariate and multivariate analysis evaluated rates and risk factors for capsular contracture.

[RESULTS] Among 451 patients, the majority underwent nipple-sparing mastectomy (262, 58.1%) with one-stage reconstruction (283, 62.7%) utilizing subpectoral implants (353, 77.4%) and acellular dermal matrix (354, 78.5%). Overall capsular contracture incidence was 9.8%; the rate after post-mastectomy radiation therapy (PMRT) was 18.7%, and 7.5% for patients without PMRT. Significant factors included neoadjuvant chemotherapy (P = 0.006), hematoma (P = 0.047), and PMRT (P = 0.001). Multivariate analysis showed that PMRT increased risk of capsular contracture (OR = 3.12, 95% CI 1.55-6.26, P = 0.001), and adjuvant chemotherapy was protective (OR = 0.289, 95% CI 0.114-0.731, P = 0.01).

[CONCLUSIONS] Incidence of capsular contracture is lower than previously reported. Advancing therapeutic techniques may reduce the risk of this complication.