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. 2014 Feb 25;8:15–38. doi: 10.4137/BCBCR.S13833

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© 2014 the author(s), publisher and licensee Libertas Academica Ltd.

This is an open-access article distributed under the terms of the Creative Commons CC-BY-NC 3.0 License.

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Screen-detected multiple clusters of powdery, dust-like calcifications; specimen radiograph with and without microfocus magnification (A,B). Thick-section (3D) histology images (C,D) demonstrate that the calcifications are localized within distended TDLUs. Low (E,G,H) and intermediate (F) power histology images: low-grade cancer in situ localized to the TDLUs. The powdery calcifications seen on the mammograms correspond to psammoma body-like calcifications. Histology: Grade 1 in situ carcinoma localized to the TDLU (not “ductal” carcinoma in situ).