Abstract
Abstract Introduction: For high-risk familial history of breast cancer, risk reducing mastectomy (RRM) is now regarded as one of the management options. The aim of this study is to analyse the outcome of women undergoing RRM from 1994 to 2010 during which surgical techniques evolved and were refined. Methods: A cohort of women undergoing RRM was followed from this single centre. Surgical and further details about demographics, comorbidities, and follow-up were retrieved form medical records. Analysis was carried out using the IBM®-SPSS®-Statistics-19system. Results: Of 154 women 139 had bilateral RRM and 15 had unilateral surgery after earlier contralateral breast cancer. Median age at operation was 39.4 years (22–63years). 54 (45.5%) women were BRCA1/2 gene mutation carriers. Most women had nipple sacrificing (86) skin-sparing mastectomy with immediate reconstruction. 132 (85.7%) had submuscular expander/implant reconstruction, whilst 9 had either LD flap reconstruction or TRAM flap reconstruction. 31 (20.1%) women had some complication including haematoma requiring evacuation, minor skin/nipple necrosis, but implant loss was rare (2). 52 (33.8%) women had revisional surgeries in 5 years post RRM of whom 29 had one unanticipated secondary operation. Complications were more common in the early years of the cohort. On histology, 3 women were identified with lobular carcinoma in-situ and one was associated with 1mm of microinvasion. 4 had ductal carcinoma in-situ and 2 of them were BRCA carriers. Two (1.2%) primary breast cancers were subsequently identified during a mean follow-up period of 9.82 years (2–18 years) but this was substantially less than prediction modelling. Both were BRCA gene mutation carriers - one had nipple sparing RRM and the other did not. Conclusions: In asymptomatic high-risk women, RRM is safe and efficacious in reducing medium term future breast cancer incidence. Surgery carries the risk of complications and cosmetic revisions can be anticipated. Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P4-14-11.
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