P07 Feasibility of preserving intercostobrachial nerve and the medial pectoral nerve during radical mastectomy and breast conservative surgery

Introduction/Background Preserving intercostobrachial nerve (IBN) and the medial pectoral nerve (MPN) during radical mastectomy (RM) and breast conservative surgery (BCS) improves the quality of life of patients (pts) with breast cancer. The aim of the study was to assess the feasibility of preserving IBN and MPN during RM and BCS. Methodology The analyses were done on a retrospective consecutive series of 164 pts with breast cancer treated by RM and BCS in the Mariupol Cancer Center from January 2017 to December 2018. Of these, 119 pts underwent RM, and 45 - BCS. Results Postoperative mortality was not observed. Morbidity was 7.6±2.4% after RM and 8.9±4.2% after BCS. After RM and BCS, it was possible to save IBN and MPN in 34.7±3.7% pts, after RM - in 27,7±4.1% pts, after BCS - in 53,3±7.4% pts. It was possible to save one of the nerves (or IBN or MPN) after RM in 1,7±1.2% pts, after BCS - in 20,0±6.0% pts. In BCS, axillary lymph node dissection from a single access was performed in 23 pts, and from a separate access in 22 pts. When using a single access, the preservation of IBN and MPN was possible in 65.2±9.9% of pts, from a separate - in 40.9±10.5%. The duration of BCS was 158.7±13.2 min. The duration of BCS with save IBN and MPN was 163.4±14.5 min, while BCS without nerve preservation - 145.8±29.6 min. The duration of RM with save IBN and MPN was 133.5±10.5 min, while the RM without nerve preservation - 101.1±10.0 min. Conclusion During RM and BCS, it is possible to save IBN and MPN in one third of pts. Disclosure Nothing to disclose.