Dipartimento Di Diagnostica Per Immagini, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Radioterapia Oncologica Ed Ematologia, Rome, Italy.
Division of Breast Surgery, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy.
Eur Radiol. 2024 Jan;34(1):149-154. doi: 10.1007/s00330-023-10008-4. Epub 2023 Aug 1.
The objective of this retrospective study was to investigate the accuracy and feasibility of magnetic seed compared to skin tattoo in preoperative localization of impalpable breast lesions in terms of accuracy of placement, re-excision and positive margins rates, and breast/surgical specimen volume ratio.
We retrospectively analyzed 77 patients who underwent breast conservative surgery in our center from November 2020 to November 2021, with previous localization with skin tattoo or magnetic seed.
Thirty-seven magnetic seeds were placed in 36 patients (48.6%) and 40 skin tattoos were performed in the remaining cases (51.4%). The seeds were placed correctly at the two-view mammogram acquired after the insertion in 97.6% (36/37) of cases. With both methods, 100% of the index lesions were completely removed and found in the surgical specimen. The reported re-excision rate was 0% for both groups. A significant difference was observed in the volume of breast parenchyma removed between the two groups, inferior in the seed group (p = 0.046), especially in case of voluminous breasts (p = 0.003) and small lesions (dimension < 8 mm, p = 0.019).
Magnetic seed is a non-radioactive localization technique, feasible to place, recommended in case of non-palpable breast lesions, saving the breast parenchyma removed compared with skin tattoo, without reducing the accuracy.
Our findings contribute to the current evidence on preoperative localization techniques for non-palpable breast lesions, highlighting the efficacy of magnetic seed localization for deep and small lesions.
• Magnetic seed is a non-radioactive technique for the preoperative localization of non-palpable breast lesions studied in comparison with skin tattoo. • Magnetic seed is feasible to place in terms of post-placement migration and distance from the target lesion. • Magnetic seed is recommended in case of non-palpable breast lesions, saving the breast parenchyma removed without reducing the accuracy.
本回顾性研究旨在探讨磁性定位针与皮肤纹身在术前定位不可触及性乳腺病变方面的准确性和可行性，比较两者在定位准确性、再次切除率和阳性切缘率以及乳房/手术标本体积比方面的差异。
我们回顾性分析了 2020 年 11 月至 2021 年 11 月在我院接受保乳手术的 77 例患者，这些患者之前均接受过皮肤纹身或磁性定位针定位。
36 例患者（48.6%）中放置了 37 枚磁性定位针，其余 40 例患者（51.4%）接受了皮肤纹身。在插入后获得的双视图乳房 X 光片上，97.6%（36/37）的定位针位置正确。两种方法均能 100%完全切除索引病变并在手术标本中找到。两组的再次切除率均为 0%。两组患者切除的乳腺实质体积存在显著差异，磁性定位针组的体积较小（p=0.046），尤其是在乳房体积较大（p=0.003）和病变较小（<8mm，p=0.019）的情况下。
磁性定位针是一种非放射性定位技术，在不可触及性乳腺病变的定位中可行，与皮肤纹身相比，可以保留更多的乳腺实质，同时不降低定位的准确性。
我们的研究结果为不可触及性乳腺病变的术前定位技术提供了当前的证据，突出了磁性定位针定位在深部和小病变中的有效性。
磁性定位针是一种非放射性技术，用于术前定位不可触及性乳腺病变，与皮肤纹身相比。
磁性定位针在定位后迁移和与目标病变的距离方面是可行的。
对于不可触及性乳腺病变，建议使用磁性定位针，在不降低准确性的情况下，保留更多的乳腺实质。
