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Recurrence-free survival curves in patients who received NAC according to baseline (a) and post-NAC (b) BPE on breast MRI. The p values for baseline and post-NAC BPEs were 0.6788 and 0.5786, respectively, determined by the log-rank test [the blue line represents low (minimal and mild) BPE, and the red line represents high (moderate and marked) BPE]. BPE, background parenchymal enhancement; NAC, neoadjuvant chemotherapy.
