Abstract P2-14-20: Comparison of robot-assisted nipple sparing mastectomy with conventional nipple sparing mastectomy: a single-center experience

Abstract Purpose: Robot-assisted nipple-sparing mastectomy (RANSM) improves cosmetic outcomes compared to conventional nipple-sparing mastectomy (CNSM) since RANSM is performed with minimal incisions. However, there are few studies on the feasibility and surgical outcome of RANSM. The aim of this study was to compare the surgical outcomes of RANSM and CNSM in breast cancer patients. Method: A retrospective observational study was conducted at our institution between January 2021 and December 2021. A total of 54 patients diagnosed with breast malignancy that underwent either a robotic-assisted or conventional nipple-sparing mastectomy were included. The demographics of the patient’s sex, age, body mass index (BMI), breast weight, and preoperative diagnosis were investigated. The surgical method, operation time (including docking time and console time in the case of robotic surgery), postoperative complications, length of hospital stay, pain score, and adjuvant therapy were analyzed. Result: A total of 57 breasts in 54 female patients were included in the study: 36 invasive ductal carcinoma patients, 11 ductal carcinoma cases, 6 invasive lobular carcinoma, 2 mucinous carcinoma, one solid papillary carcinoma and one lobular carcinoma in situ. A median age of 49(27-66), mean BMI of 22 (18.89-26.28), and mean breast weight was 246 g (120-305g). The mean operation time was 122 minutes (robotic 140 vs. conventional 118), and the average docking time was five minutes and console time 60 minutes in the robot-assisted surgery. There was only one postoperative complication in the robot group and ten cases in the conventional group. The mean hospital stay was 12.6 days (RANSM 10.75 vs. CNSM 12.92), and the average pain score was 3.53 (RANSM 3.50 vs. CNSM 3.54). None needed adjuvant therapy in the robot group. In the conventional surgical group, four patients underwent adjuvant radiotherapy and sixteen patients underwent chemotherapy including six neoadjuvant cases. Conclusion: Our results showed that RANSM had advantages of shorter hospitalization and lower pain scores although it had slightly longer operation time and could not applicable in relatively large breasts. In the near future, RANSM may be considered as the surgery of choice over CNSM in breast cancer patients. Citation Format: Ji Young You, Haemin Lee, Eun-Shin Lee, Seung Pil Jung. Comparison of robot-assisted nipple sparing mastectomy with conventional nipple sparing mastectomy: a single-center experience. [abstract]. In: Proceedings of the 2022 San Antonio Breast Cancer Symposium; 2022 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2023;83(5 Suppl):Abstract nr P2-14-20.