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(a–c) Images show a right-sided 5-mm invasive ductal not-otherwise-specified grade 1 cancer detected by the second reader only. Further tests revealed estrogen receptor and progesterone receptor positivity and human epidermal growth factor receptor 2 negativity; none of three axillary nodes sampled were positive. (a) Right craniocaudal mammographic view. (b) Right mediolateral oblique mammographic view. (c) US image.
