Abstract P4-14-01: Incidence rate of nipple areolar complex ischemia after nipple sparing mastectomy. Analysis of the American Society of Breast Surgeons Nipple Sparing Mastectomy Registry.
Authors: Mitchell SD , Willey SC , Feldman SM , Beitsch PD , Unzeitig GW , Manasseh DME , Neumayer LA , Laidley AL , Grutman SB , Habal N , Busch-Devereaux E , Dupont EL , Ashikari AY 
Published: August 2014

Abstract
Objectives: The American Society of Breast Surgeons (ASBS) Nipple Sparing Mastectomy Registry (NSMR) is a prospective, non- randomized, IRB approved multi-center registry. The ASBS NSMR has been designed to facilitate compilation of information on metrics utilized, techniques utilized, aesthetic outcomes, as well as oncologic outcomes for the nipple sparing mastectomy. The NSMR will be ongoing for 10 years with an initial N of 1000. Patient selection entails all patients undergoing a NSM at the participating institutions who have agreed to participate. We evaluated the incidence rate of nipple or nipple areolar complex ischemia after a nipple sparing mastectomy.
Method: The first 173 patients entered into the ASBS NSMR (2011–2012) were analyzed for incidence rate of ischemia of the nipple or nipple areolar complex (NAC). Ischemia is defined as epidermolysis (partial thickness necrosis) or full thickness necrosis. Metrics analyzed included: postoperative NAC status, indication for surgery, patient characteristics, incision utilized, sub areolar and flap dissection technique, as well as cosmetic outcomes.
Results: (Thirty-five) surgeons entered 265 NSMs on 173 patients into the ASBS NSM Registry. Indications included invasive carcinoma, DCIS, and prophylaxis. Incisions utilized included radial +/− peri -areolar extension, infra mammary fold, peri- areolar ellipse/ hemi batwing, previous lumpectomy site, and previous mastopexy incisions. Sub areolar and flap dissection technique included sharp +/− tumescent injection, electrocautery, or plasma blade. Reconstruction type included tissue expander, immediate implant, or autologous flap. Median follow-up was 5 months (range 1–16 months).
The nipple or NAC in 33 (12%) of 265 mastectomies experienced some degree of ischemia. Out of a total of 265 mastectomies 3 (1%) required surgical debridement, 1 (0.3%) required surgical excision, and 29 (11%) experienced epidermolysis with full recovery (17 topical treatment and 12 no treatment). No correlation in incision type, method of dissection, utilization of separate axillary incision for SLNBx/AXLND, size or location of tumor, type of reconstruction, initial fill volume if tissue expanders utilized, previous breast surgery, previous radiation therapy, previous chemotherapy, smoking history, cup size, degree of ptosis, or indication for surgery was found in NACs undergoing ischemia versus those that did not. Cosmetic outcome assessed by the surgeon as well as patient satisfaction did not vary from the population that did not experience nipple/NAC ischemia. Cosmetic results were rated consistently as good or excellent.
Conclusion: We report a 12% incidence rate of nipple or nipple areolar complex ischemia ranging from epidermolysis to full thickness necrosis: 3 (1%) requiring surgical debridement, 1 (0.3%) requiring excision, and 29 (11%) exhibiting epidermolysis with full recovery. Surgical debridement or excision was rarely necessary. Epidermolysis was found to resolve with no bearing on perceived cosmetic outcome.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P4-14-01.