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A patient from the high-dose group with an history of invasive ductal breast cancer (pT2 N2a M0). Follow-up of the axillary region was acquired 2.5 years after magnetic sentinel lymph node biopsy. a shows a T1-weighted image without visible small particle iron oxide (SPIO) accumulation in the lymph nodes), while b shows T2*-weighted image with signal voids due to SPIO accumulation in three lymph nodes
