Deep Injection Technique for Magtrace® in Sentinel Lymph Node Biopsy with Sentimag® technique in Breast Cancer Patients.

Background: Sentimag® technique for SLNB in breast cancer patients is relatively a new technique where Magtrace® tracer, superparamagnetic iron oxide (SPIO) nanoparticles, is injected in the sub-areolar area. During the surgery, sentinel lymph nodes are identified using the Sentimag® magnetometer and visual aid. The Magtrace® leaves a brownish discoloration around the injection site which could last for a long time. We have observed persistent brownish discoloration in patients lasting even for more than two years.