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MR images and pathological findings of a case with iCR and pCR. a, d MR images of a HER2-enriched breast cancer before (a) and after (d) NAC. No enhancement was detected by MRI after NAC. c–f Histological findings of the pathological specimens before (c, d) and after (e, f) NAC. Hematoxylin and eosin staining at low (×40, c, e) and high (×100, d, f) magnification. No residual invasive cancer cells were identified. Fibrotic and granular changes are observed instead
