Viral Nephropathies: Core Curriculum 2008

Human immunodeficiency virus–associated nephropathy with focal segmental glomerulosclerosis, areas of tubulointerstitial fibrosis with tubular atrophy, and dilated tubules with proteinaceous casts. (Original magnification ×10.) (Courtesy of Dr John Tomaszewski, Department of Pathology, University of Pennsylvania, Philadelphia, PA.)

Human immunodeficiency virus–associated nephropathy with collapsing glomerulosclerosis. (Trichrome methenamine silver stain.) (Courtesy of Dr John Tomaszewski, Department of Pathology, University of Pennsylvania, Philadelphia, PA.)

Histological features of viral cytopathy in a kidney recipient with BK virus nephropathy, including tubules containing epithelial cells with nuclear enlargement and granular intranuclear inclusions (arrows). Surrounding tubules show some degenerative changes and sloughing. (Courtesy of Dr John Tomaszewski, Department of Pathology, University of Pennsylvania, Philadelphia, PA.)