Magnetic seeds vs. radioactive tracers: which better guides breast tumor removal?

This study compares two modern, wire-free methods for locating non-palpable breast lesions before surgery: radioguided occult lesion localization (ROLL) using a radioactive tracer, and magnetic seed localization. The goal is to see which technique more reliably achieves clear surgical margins (no cancer cells at the edge of removed tissue) while minimizing excess tissue removal. The trial enrolls women with non-palpable, borderline or malignant breast lesions who are scheduled for breast-conserving surgery.