Abstract P3-13-06: Breast conserving surgery by periareolar mammoplasty – Surgical and oncological outcomes

Abstract

Abstract Background Periareolar mammoplasty is a volume displacement oncoplastic technique for patients with small to medium sized breasts. This approach provides good access for a safe excision for both central and peripheral lesions, especially for those in the upper half of the breast. Cosmetically it allows good reshaping of the breast, and contralateral symmetrisation is rarely required. This technique has the potential to replace the standard wide local excision for breast cancer. There is scarcity of data about the results of this procedure in the literature. We present a single surgeon experience with this technique in terms of surgical and oncological outcomes. Methods Retrospective review of patients' records from October 2013 to December 2017 was performed. The patients' demographics, tumour characteristics and the early oncological outcomes were studied. The postoperative complications and rate of symmetrisation were also studied. Results -There were 110 patients in this study period. The median age was 60 years (range 36 – 82 years) and screen detected tumours accounted for 66% (72 patients) of cases. -Neoadjuvant therapy was given in 14 patients (endocrine therapy – 12, chemotherapy – 1, dual targeted therapy – 1). -Most patients had the lesion in the upper half of the breast (upper outer-71, upper inner-33). -The average size of the tumour was 18.9mm (range 1.8 – 70mm) and the average weight of the excised specimen was 47.2gm (range 11-190gms). Invasive carcinoma was seen in 94 patients (85%) of which 86 patients had invasive ductal carcinoma, 4 had invasive lobular carcinoma and 4 had special type. Pure DCIS was present in 16 patients (15%). Most patients had grade 2 cancers (45%). DCIS was present with invasive carcinoma in 55% of cases. -Thirteen patients had positive margins (<1mm) and DCIS coexisted with invasive carcinoma in 7 of 13 patients. Four patients with pure DCIS had positive margins. -Of the 13 patients with positive margins: 5 required margin re-excision, 6 had completion mastectomy and 2 received only radiotherapy. -The median follow-up was 25 months (range 3 – 53 months). Seven patients developed complications which included 3 hematomas (2 requiring evacuation) and 4 wound infection which were treated with antibiotics. Only two patients required contralateral symmetrisation and no local recurrences were encountered in this study period. Conclusion Periareolar mammoplasty is a robust, easily adaptable and reproducible oncoplastic technique allowing for safe wide local excision of breast cancer. The margin re-excision, postoperative complication and recurrence rates in this study are acceptable and low compared to standard wide local excision. This technique gives excellent access, and allows better breast reshaping resulting in pleasing aesthetic outcome. Contralateral symmetrisation is rarely required with this technique. Citation Format: Burrah R, Vinayagam R, James K. Breast conserving surgery by periareolar mammoplasty – Surgical and oncological outcomes [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-13-06.