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		Fibrillary and Immunotactoid Glomerulopathies

Mesangial proliferation is suggestive of fibrillary glomerulopathy; however, the diagnosis requires negative Congo red stain, IgG staining by immunofluorescence, and demonstration of fibril on electron microscopy (Jones silver stain, ×400)

Image provided by Agnes Fogo, MD and the American Journal of Kidney Disease's Atlas of Renal Pathology (see www.ajkd.org).