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MR images of a 46-year-old female with moderate BPE before (a and b) and after (c and d) NAC. A tumor involving the right breast (arrows) decreased in size; however, the BPE was almost unchanged after NAC. The histopathological tumor response was a partial response. After 28 months, locoregional recurrence occurred in the ipsilateral lymph nodes. BPE, background parenchymal enhancement; NAC, neoadjuvant chemotherapy.
