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Histology of intraplaque haemorrhage (A: Masson's trichrome, mosaic reconstituted section, ×2.5) showing the presence of intact RBCs and free haemoglobin (inset, ×20). (B) Iron visualized by Prussian blue (Perl's) stain with nuclear red counterstaining, showing the haemoglobin-dependent presence of iron, mainly localized in the vicinity of neocapillaries and within phagocytic cells (insets, ×20 and ×40, arrow).
