Abstract P3-13-05: Comparing conventional breast conserving surgery with the minimally invasive approach technique to treat early breast cancer - a retrospective case control study
Authors: Bromberg S , Figueiredo P , Ades F 
Published: May 2019

Abstract
Background/Objective: The objective of the study was to compare the oncological safety and aesthetical results between the minimally invasive technique and the conventional breast conserving surgery. Breast conserving surgery was developed to avoid mastectomy and has become the standard of care in early stage breast cancer. Patient concerns with aesthetics have led to the development of oncoplastic surgical approaches. It has been demonstrated that the aesthetic success in breast cancer surgical treatment leads to improved sexual and social recovery. In patients that have no desire or no need for associated mammoplasty, minimally invasive treatments allow the maintenance of the breast pre-surgical appearance. The mínimally invasive technique is an oncoplastic surgery aimed to remove both the breast tumor and the sentinel lymph node through one incision, thus providing better aesthetic results than the conventional breast conservative two incision technique.
Methods: We retrospectively evaluated 2 cohorts of 60 consecutive early breast cancer patients ( invasive breast cancer measuring no more than 25mm and clinically axillary negative lymph nodes ) operated by either conventional breast conserving surgery (N=26) or one incision surgery (N=34). We selected patients that have no desire or no need for associated mammoplasty. We compared the mammary volume tissue removed; surgical time; number of dissected lymph nodes; surgical complications such as seroma, infection, and dehiscence of the surgical wound; and deformities, retractions, and subsequent aesthetic sequelae.
Results: In the minimally invasive technique group the breast volume removed was significantly lower than in the conventional surgery technique group as well as was the surgical time and the number of dissected lymph nodes.
Demographics and surgical results Minimally invasive surgery ( n=34)Conventional surgery (n=26)P valueAge 0.241Medium53.9(11.4)57.4(11.3) Range33 - 7634 - 85 Disease Stage 0.482I30(88.2)21(80.8) II4(11.8)5(19.2) Incision &gt;0.99Axilla1 (3.1)0 (0.0) Periareolar21(65.6)17(65.4) Sulcus10(31.3)9(34.6) Breast dissected volume &lt;0.001Medium16.3(8.5; 26.7)42.4(14.4; 112.2) Range2 - 905 - 270 Dissected lymph nodes &lt;0.001Medium (IIQ)2(1-5)4(1-13) Range1 - 181 - 31 Surgical time (min) 0.010Medium130(105; 170)180(110; 240) Range30 - 22050 - 275
No cases required enlargement of the margins and aesthetical results were better in theminimally invasive technique with only incision group.
Conclusions: The minimally invasive approach to treat early breast cancer was shown to be similar to the conventional breast conserving surgery in terms of oncologic outcomes but providing better cosmetic result.
Citation Format: Bromberg S, Figueiredo P, Ades F. Comparing conventional breast conserving surgery with the minimally invasive approach technique to treat early breast cancer - a retrospective case control study [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 P3-13-05.