Magseed® Marker
A small metallic seed designed to guide you to your target with precision,1 allowing you to remove only what you need to.2
Overview
Documents
The New Standard in Breast Localisation
The Magseed marker is a wire-free localisation device which decouples surgery from radiology placement, enabling efficiencies in the patient pathway through reduced start delays and a shorter localisation time compared to guidewires.3
Targeted Placement
With the choice of when and where to mark the cancer, you have ultimate control over placement.
Repeatable Detection
Easily detectable, the Magseed marker guides you to your target with precision.1
Firm Implantation
The Magseed marker is designed not to move, break or deactivate - no matter when it’s implanted.4
Accurate Removal
Being certain of the cancer location means you can remove it, while leaving behind as much healthy tissue as possible.
Unlock the Advantage of Time
The Breast Health Continuum of Care offers integrated solutions for clinical confidence, workflow efficiency and compassionate patient care. It gives more women, more time in better health.
The Magseed Marker is part of the Hologic Breast Surgery Solution.
Clinical Evidence
The Magseed marker is widely proven across an extensive library of over 100 clinical data publications.
A prominent example is a large 2023 multi-centre Phase III RCT study, featuring the highest level of data recorded for any seed marker at the time of publication.5
15,000+
patients in Magseed marker clinical data publications.6
2.87%
re-excision rate in the Phase III RCT study.5
8.61%
reduction in operative time in the Phase III RCT study.5
Sentimag® System: One platform enabling multiple procedures
Our most advanced surgical guidance system yet. All you need within one platform to mark and localise lesions and lymph nodes. No wires. No radioactivity. No brainer.
Visit Our Virtual Hospital
Browse our portfolio of Breast Health solutions in 3D. See how you can unlock the advantage of time across the entire Breast Continuum of Care.
Insights
Boland et al (2023) Isotropy of Seed Localisation for Breast-conserving Surgery – A Laboratory Assessment [Poster]. ASBrS Annual Meeting, 26-30 April 2023.
Data on file at Endomag Scientific and Clinical Literature Review – Magseed – June 2025
Lake B, et al. (2023) The magnetic effect: sustainability of patient centric outcomes, time and cost saving following 5 years of Magseed experience. The Shrewsbury and Telford Hospital NHS Trust. 2023. ESSO 2023 poster presentation (Study of 501 Magseed® marker-guided procedures)
Data on file at Endomag Scientific and Clinical Literature Review – Magseed – June 2025. Complaints data on file at Endomag. Data correct as of March 2026.
Pantiora et al (2023), Magnetic Seed vs Guidewire Breast Cancer Localization With Magnetic Lymph Node Detection: A Randomized Clinical Trial. JAMA Surg. 2024 Mar 1;159(3):239-246. doi: 10.1001/jamasurg (Multi-center study featuring 426 patients)
Data on file at Endomag. Internal Meta-Analysis 300625 of Clinical Studies. Data correct as of March 2026.
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