- Magseed localization of nonpalpable breast cancer localization is just as effective as wire-guided approaches for identifying tumors and excising with tumor-free margins.
- Reoperation rates were also comparable.
Why this matters
- This alternative allows for continuous reorientation during surgery and decouples radiology and surgery scheduling.
- No differences were identified between Magseed and wire-guided localization for:
- Reexcision: Magseed 16% vs wire-guided 14% (P=.692),
- Specimen sizes: Magseed 39.6 g vs wire-guided 44.5 g (P=.206); 90.1 cc for Magseed vs 95.6 cc for wire-guided (P=.579), and
- Successful localization; identification (100% in both groups).
- 84% with Magseed had 1-mm disease-free margins vs 86% with wire-guided localization (P=.692).
- 1 patient with Magseed group developed a hematoma that dislodged the seed; a second patient had a skin-adjacent seed dislodged during dissection.
- Prospective study, 100 patients having Magseed vs 100 having wire-guided localization, October 2017-September 2018.
- Funding: None disclosed.
- Surgeons were less experienced working with Magseed.