Figure 3.

Congo red staining (X400). The arrows point to Congo red positive material deposition in glomerular mesangial areas (A), walls of the renal arteries (B), and the intestine (C). (D) A polarization image of the Congo red stain shows positive material deposition in glomerular mesangial areas (red arrows) and walls of the renal arteries (yellow arrows).

Zhang et al. Diagnostic Pathology 2012 7:176   doi:10.1186/1746-1596-7-176
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