Abstract P4-02-19: First reported use of the Faxitron LOCalizer™ Radiofrequency Identification (RFID) system in the axilla- A pilot trial in targeted axillary dissection (TAD)

Abstract

Abstract Introduction: Adequately marking suspicious lymph nodes before neoadjuvant chemotherapy in breast cancer patients is commonly done by introducing a titanium clip followed by stereotactic hook wire location. However, clip dislocation and/or wire dislocation are common problems. Furthermore, locating a clip within the axilla is problematic since stereotactic location may be anatomically challenging. An ideal solution would be a clip which can be easily found without the use of a stereotactic intervention. This pilot trial proves the concept of using radiofrequency identification devices (RFID) in targeted axillary dissection (TAD).Methods: This pilot trial represents a single center, consecutively recruited, evaluation (n=10) for targeted axillary dissection using the Faxitron LOCalizer™ radiofrequency identification chip system. Patients were given the choice between wire guided TAD vs. LOCalizer™ TAD. Primary endpoints were: percentage of successful location /failure to locate. Secondary endpoints were major and minor complication rates as well as surgeon evaluated outcome.Results: Primary endpoints showed a 100% location rate of the suspicious lymph nodes at a 0% major complication (revision surgery) rate. Additional guided wire marking was not necessary for lymph node location. Surgeons evaluated the new system as being safe to use and only slightly more difficult to place than a standard clip or a wire system.Conclusion: This pilot trial proved the concept of TAD via a RFID system. When using this system, preoperative stereotactic lymph node marking is no longer required, thus patients may be spared additional x-ray exposure. Using the LOCalizer™ system should therefore be considered for any TAD. Citation Format: Wolfram Malter, Christian Eichler, Julian Puppe, Fabishy Thangarajah, Peter Mallmann, Barbara Krug, Mathias Warm, Johannes Holtschmidt. First reported use of the Faxitron LOCalizer™ Radiofrequency Identification (RFID) system in the axilla- A pilot trial in targeted axillary dissection (TAD) [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P4-02-19.