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Fibrillary Glomerulopathy (Fibrils) |
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Randomly arranged fibrils in mesangial and capillary loops are seen on transmission electron microscopy (left). Negative Congo red stains are necessary to exclude renal amyloidosis (×25,625). The right image shows a high-power view of fibrils, which are coarser in diameter than amyloid deposits (×98,000).
Images provided by Agnes Fogo, MD and the American Journal of Kidney Disease's Atlas of Renal Pathology (see www.ajkd.org).