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. 2017 Jun 22;103(19):1528–1535. doi: 10.1136/heartjnl-2016-311018

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Histology section of trucut biopsy from infarcted myocardium. (A) Haematoxylin and eosin (×5 magnification) stain displaying a thin region of viable healthy myocardium (strip of dark pink) surrounded by infarcted myocardium (lighter pink). (D) Infarcted myocardium shows an abundance of inflammatory cells and early granulation formation. (B) Prussian blue (×5) staining revealing intracellular iron (E, ×20 and G, ×50), not seen in the region of healthy myocardium. (C) CD68 (×5) staining revealing macrophages within the infarcted myocardium (F, ×20 and H, ×50), again not seen in healthy myocardium. G+H show colocalisation of iron within macrophages.