Long-Term Oncologic Safety of Nipple-Sparing Mastectomy With Immediate Reconstruction.

BACKGROUND: We assessed the long-term oncologic safety of nipple-sparing mastectomy (NSM) compared to skin-sparing mastectomy (SSM) for primary breast cancer patients with immediate reconstruction. PATIENTS AND METHODS: Data of stage 0-III primary breast cancer patients undergoing NSM (n = 190) or SSM (n = 729) from June 2006 to December 2012 were retrospectively collected. Nipple-tumor distance (NTD) was measured on pretreatment mammography, magnetic resonance imaging, or ultrasonography findings. NSM patients with NTD < 1 cm were excluded. Locoregional recurrence (LRR) rates were compared between groups. Disease-free survival (DFS) and overall survival (OS) according to surgical procedure were assessed. RESULTS: The median (range) follow-up period for NSM and SSM was 71 (10-131) months and 79 (9-140) months, respectively. LRR developed in 11 patients with invasive ductal carcinoma (5.8%) for NSM and 44 (42 in patients with invasive ductal carcinoma and 2 in patients with ductal carcinoma-in-situ) (6.0%) for SSM. Hormone receptor and HER2 status were not associated with LRR in either group. DFS and OS rates did not differ between groups (DFS: 89.3% for NSM, 89.3% for SSM, P = .87; OS: 98.4% for NSM, 94.5% for SSM, P = .43). CONCLUSION: NSM with immediate reconstruction was as safe as SSM for primary breast cancer with respect to prognosis and local control, regardless of the presence of invasive carcinoma or breast cancer subtype.