Fig. 2
From: A 64-year-old woman with raccoon eyes following kidney biopsy: a case report
a Congo red staining of kidney biopsy specimen and the picture of typical apple-green birefringence under polarized microscopy (× 200). b and c Immunofluorescence microscopy showed prominent staining for lambda light chain and much weaker kappa light chain (× 400). d Electron micrograph showing expansion of the mesagium by amyloid fibrils, which can measure 8–12 nm in diameter. The fibrillar appearance is best appreciated at the arrow (× 10,000)