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. 2021 Oct 1;480(2):231–245. doi: 10.1007/s00428-021-03188-1

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — A Iron pill gastritis with gastric erosion with presence of interstitial aggregates of amorphous yellow-ochre substance together with neutrophils in a patient taking iron supplements for anemia (H&E, magnification 40 ×). B Iron pill gastritis stained with Perls Prussian blue stain demonstrating the ferrous nature of the deposits (Perls Prussian blue, magnification 40 ×). C Yttrium-90 microspheres in gastric biopsies with ulcers, active inflammation and epithelial damage in a patient treated by radioembolization with yttrium-90 microspheres for liver cancer. Lesions are coherent with radiation injury and black, spherical foreign bodies are seen in the mucosa and submucosa, within a cian dashed line box (H&E, magnification 10 ×). D Higher magnification of yttrium-90 microspheres (arrows) (H&E, magnification 20 ×)