IOTPC is a reliable extemporaneous method for assessing surgical margins in conservative treatment for breast cancer and a useful tool for surgeons.

Background Nipple-sparing mastectomy (NSM) with immediate breast reconstruction (IBR) is used increasingly when performing a prophylactic mastectomy. Few prospective studies have reported on complication rates. This complementary trial to the French prospective multicentre MAPAM trial aimed to evaluate the nipple–areola complex (NAC) necrosis rate in prophylactic NSM with IBR. Methods Patient characteristics and surgical data were recorded. Morbidity after prophylactic NSM with a focus on NAC necrosis was analysed. Results Among 59 women undergoing prophylactic NSM, 19 (32 per cent) of the incisions were partly on the NAC. Reconstructions were performed with 46 definitive implants and 13 expanders. The crude rate of postoperative complications was 25 per cent (15 patients). Complete NAC necrosis was reported in two women (3 per cent) and partial or total necrosis in nine (15 per cent). No NAC resection was necessary. Median BMI was lower in women with total or partial NAC necrosis compared with the others (20.0 versus 21.3 kg/m2 respectively; P = 0.034). Conclusion Results of this prospective study confirm that prophylactic NSM with IBR is associated with a low risk of total NAC necrosis.

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