{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T12:46:03Z","timestamp":1778157963145,"version":"3.51.4"},"reference-count":35,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2022,12,16]],"date-time":"2022-12-16T00:00:00Z","timestamp":1671148800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cancers"],"abstract":"<jats:p>(1) Background: Paramagnetic seeds are a safe alternative for the wire-guided localisation of non-palpable breast lesions, but can also be applied for non-breast lesions. This study presents the experience with a paramagnetic seed, MagSeed\u00ae (Endomagnetics Ltd., Cambridge, UK, CE-registered and FDA-cleared), in an academic and non-academic breast centre. (2) Methods: Multicentre, retrospective analysis of 374 consecutive patients who underwent surgery after paramagnetic seed localisation (MSL) between 2018 and 2020. Indications for localisation included non-palpable breast lesions (n = 356), lymph nodes (n = 15) or soft tissue lesions (n = 3). The primary outcome was feasibility and the rate of positive section margins. The secondary outcome was predictive factors for positive section margins. (3) Results: The accurate excision of high-risk breast lesions, lymph nodes and soft tissue lesions was seen in 91.07% (n = 56). Positive section margins were observed in 7.86% (n = 25) after breast conserving surgery for invasive or ductal carcinoma in situ (DCIS) (n = 318). Invasive breast cancer associated with DCIS (p = 0.043) and the size of DCIS (p &lt; 0.001) were significantly correlated with the positive section margins. (4) Conclusion: This study confirms the feasibility of MSL, as well as the higher risk for positive margins in cases of breast carcinoma with associated DCIS. Soft tissue lesions and lymph nodes associated with other malignancies, e.g., melanoma, can also be localised with paramagnetic seeds. This offers perspectives for future applications, such as the de-escalation of axillary treatment in breast cancer.<\/jats:p>","DOI":"10.3390\/cancers14246215","type":"journal-article","created":{"date-parts":[[2022,12,19]],"date-time":"2022-12-19T08:41:41Z","timestamp":1671439301000},"page":"6215","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Retrospective Cohort Study of Practical Applications of Paramagnetic Seed Localisation in Breast Carcinoma and Other Malignancies"],"prefix":"10.3390","volume":"14","author":[{"given":"C\u00e9line","family":"Clement","sequence":"first","affiliation":[{"name":"Multidisciplinary Breast Centre Department Surgical Oncology, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lieve","family":"Schops","sequence":"additional","affiliation":[{"name":"Department Gynaecology, Noorderhart Ziekenhuis Pelt, 3900 Pelt, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ines","family":"Nevelsteen","sequence":"additional","affiliation":[{"name":"Multidisciplinary Breast Centre Department Surgical Oncology, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Soetkin","family":"Thijssen","sequence":"additional","affiliation":[{"name":"Department Gynaecology, Noorderhart Ziekenhuis Pelt, 3900 Pelt, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chantal","family":"Van Ongeval","sequence":"additional","affiliation":[{"name":"Multidisciplinary Breast Centre Department Radiology, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Machteld","family":"Keupers","sequence":"additional","affiliation":[{"name":"Multidisciplinary Breast Centre Department Radiology, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Renate","family":"Prevos","sequence":"additional","affiliation":[{"name":"Multidisciplinary Breast Centre Department Radiology, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Valerie","family":"Celis","sequence":"additional","affiliation":[{"name":"Multidisciplinary Breast Centre Department Radiology, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1434-9460","authenticated-orcid":false,"given":"Patrick","family":"Neven","sequence":"additional","affiliation":[{"name":"Multidisciplinary Breast Centre Department of Gynaecology and Obstetrics, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sileny","family":"Han","sequence":"additional","affiliation":[{"name":"Multidisciplinary Breast Centre Department of Gynaecology and Obstetrics, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Annouschka","family":"Laenen","sequence":"additional","affiliation":[{"name":"Leuven Biostatistics and Statistical Bioinformatics Centre (L-BioStat), 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5091-6602","authenticated-orcid":false,"given":"Ann","family":"Smeets","sequence":"additional","affiliation":[{"name":"Multidisciplinary Breast Centre Department Surgical Oncology, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1378","DOI":"10.2214\/AJR.09.3423","article-title":"The Positive Predictive Value of BI-RADS Microcalcification Descriptors and Final Assessment Categories","volume":"194","author":"Bent","year":"2010","journal-title":"Am. 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