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  • Title: Discrimination between postinfectious IgA-dominant glomerulonephritis and idiopathic IgA nephropathy.
    Author: Wen YK, Chen ML.
    Journal: Ren Fail; 2010 Jun; 32(5):572-7. PubMed ID: 20486840.
    Abstract:
    BACKGROUND: A unique form of postinfectious glomerulonephritis (PIGN) with IgA-dominant deposition mimicking IgA nephropathy has been increasingly reported. METHODS: We compared the clinical and histological features of 12 patients with postinfectious IgA-dominant glomerulonephritis to 134 patients with idiopathic IgA nephropathy. RESULTS: In addition to hypocomplementemia and subepithelial hump-shaped deposits characteristic of PIGN, patients with postinfectious IgA-dominant glomerulonephritis had older age (62.3 +/- 16.9 vs. 37.9 +/- 16.3 years; p < 0.001) and more frequently presented with acute renal failure (83.3% vs. 10.4%; p < 0.001) than patients with idiopathic IgA nephropathy. Moreover, glomerular changes including endocapillary proliferation, neutrophil infiltration, and capillary loops deposits by immunofluorescence were more commonly present in postinfectious IgA-dominant glomerulonephritis group (p < 0.001). CONCLUSIONS: PIGN could be characterized by glomerular IgA-dominant deposition resembling idiopathic IgA nephropathy. It is essential to differentiate postinfectious IgA-dominant glomerulonephritis from idiopathic IgA nephropathy because of the different treatments and prognosis of the two diseases.
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