Journal
ANNALS OF SURGICAL ONCOLOGY
Volume 22, Issue 10, Pages 3241-3249Publisher
SPRINGER
DOI: 10.1245/s10434-015-4739-1
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Nipple-sparing mastectomy (NSM) is an increasingly common procedure; however, concerns exist regarding its oncological safety due to the potential for residual breast tissue to harbor occult malignancy or future cancer. A systematic literature review was performed. Studies with internal comparison arms evaluating therapeutic NSM versus skin-sparing mastectomy (SSM) and/or modified radical mastectomy (MRM) were included in a meta-analysis of overall survival (OS), disease-free survival (DFS), and local recurrence (LR). Studies lacking comparison arms were only included in the systematic review to evaluate mean OS, DFS, LR, and nipple-areolar recurrence (NAR). The search yielded 851 articles. Twenty studies with 5594 patients met selection criteria. The meta-analysis included eight studies with comparison arms. Seven studies that compared OS found a 3.4 % risk difference between NSM and MRM/SSM, five studies that compared DFS found a 9.6 % risk difference between NSM and MRM/SSM, and eight studies that compared LR found a 0.4 % risk difference between NSM and MRM/SSM. Risk differences for all outcomes were not statistically significant. The systematic review included all 20 studies and evaluated OS, DFS, LR, and NAR. Studies with follow-up intervals of < 3 years, 3-5 years, and > 5 years had mean OS of 97.2, 97.9, and 86.8 %; DFS of 93.1, 92.3, and 76.1 %; LR of 5.4, 1.4, and 11.4 %; and NAR of 2.1, 1.0, and 3.4 %, respectively. This study did not detect adverse oncologic outcomes of NSM in carefully selected women with early-stage breast cancer. Use of prospective data registries, notably the Nipple-Sparing Mastectomy Registry, will add clarity to this important clinical question.
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