THE MERCK MANUAL: The Merck Manual of Diagnosis and Therapymultimedia


  • Fibrillary and Immunotactoid Glomerulopathies
  • Fibrillary Glomerulopathy (Fibrils)

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    Fibrillary Glomerulopathy (Fibrils)

    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