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Fibrillary glomerulonephritis in an HIV patient without concurrent hepatitis C infection: Case report and review of the literature

Zhang, Lian; Carson, John M; Lucia, M Scott.
Clin Nephrol; 89(5): 381-386, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29578397
The most common renal disease associated with human immunodeficiency virus infection (HIV) is HIV-associated nephropathy (HIVAN), especially in the African American patient population. However, various patterns of glomerulonephritis (GN) are not uncommon, collectively accounting for nearly half of the renal biopsies performed in HIV patients. Most GNs that occur in HIV patients are immune complex mediated, often with concurrent infections such as hepatitis B or C. Fibrillary glomerulonephritis (FGN), a rare primary glomerular disease, has only been reported in 2 HIV patients, and both patients had concurrent hepatitis C (HCV) infection. Here we report a unique case of FGN with unusual ultrastructural morphology in an HIV-positive African American patient without concurrent HCV infection. The patient presented with nephrotic range proteinuria and renal insufficiency. A percutaneous kidney biopsy showed mesangial and segmental endocapillary proliferative GN with crescent formation. Immunofluorescence studies revealed IgG-, κ-, and C3-positive deposits in the mesangium and capillary loops. Electron microscopy demonstrated diagnostic features of FGN: randomly-arranged fibrillary deposits with a diameter of 15 - 30 nm. The deposits had an unusual distribution pattern of hump-like large deposits on the subepithelial aspect. Additionally, smaller deposits were also present in the mesangium. To our knowledge, this is the first reported case of FGN in an HIV patient without concurrent HCV infection.
Selo DaSilva