This histology figure confirms the presence of intra-plaque haemorrhage of the patient plaque in Fig. 4. a) Hematoxylin and eosin stain(H&E). * lumen; § fibrous cap; +surgical artefacts. b) Maisson's trichrome staining of serial 5 μm plaque sections. These images show a large lipid-rich necrotic core (LRNC) within an eccentric carotid atherosclerotic plaque with recent intra-plaque haemorrhage (IPH). c) Fibrin (in blood) stained bright pink in H&E and bright red in trichrome. Background lipid core seen as cholesterol clefts. Collagen stained green in trichrome. Calcification stained blue by haematoxylin and remained pale/unstained in trichrome. d) Image taken from section location 6 mm above bifurcation.