Safety and efficacy of magnetic seed localisation of non-palpable breast lesions: pilot study in a Chinese population

• Published in: Hong Kong medical journal = Xianggang yi xue za zhi Vol. 26; no. 6; p. 500
• Main Authors: Fung, W Y, Wong, T, Chau, C M, Yu, Ellen LM, Chan, T S, Chan, Rois LS, Yung, Alfred WT, Johnny KF Ma
• Format: Journal Article
• Language: Chinese; English
• Published: Hong Kong Hong Kong Academy of Medicine 01.12.2020
• Subjects: Biopsy; Localization; Magnetic fields; Migration; Pathology; Patients; Success; Surgeons; Surgery; Ultrasonic imaging; United Kingdom > UK
• ISSN: 1024-2708; 2226-8707
• DOI: 10.12809/hkmj208559

Introduction: A magnetic seed marker system (Magseed, Endomagnetics, Cambridge, United Kingdom) is used as a localisation method for non-palpable breast lesions in the United States, Europe, and Hong Kong. It overcomes many limitations of conventional techniques and allows scheduling flexibility. We sought to evaluate its efficacy and safety in the Chinese population. Methods: We retrospectively reviewed all Chinese women who underwent magnetic seed marker–guided breast lesion excision from June 2019 to February 2020 at a single institution. Placement success (final target-to-seed distance <10 mm) was evaluated by imaging on the day of surgery. Specimen radiographs and pathology reports were reviewed for magnetic seed markers and target removal. Margin clearance and re-excision rates were analysed. Results: Twenty two magnetic seed markers were placed in 21 patients under sonographic or stereotactic guidance to localise 21 target lesions. One target lesion required two magnetic seed markers for bracketing. Th