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  • Title: Nonprogressive, histologically mild membranous glomerulonephritis appearing in all evolutionary phases as histologically "early" membranous glomerulonephritis.
    Author: Törnroth T, Tallqvist G, Pasternack A, Linder E.
    Journal: Kidney Int; 1978 Nov; 14(5):511-21. PubMed ID: 750696.
    Abstract:
    Seven adult patients with idiopathic nephrotic syndrome and with a glomerular histology considered normal but with ultrastructurally provable membranous glomerulonephritis (MNG) were studied. The glomerular lesions were found to represent all ultrastructural evolutionary phases (A,B, and C) of MGN. In patients with serial biopsies, the membranous lesion seemed to have passed through all of its evolutionary phases towards healing (C) without developing spikes or thickening of the glomerular basement membrane (GBM), i.e., the traditional light microscopic characteristics of MGN. This evolution was associated with a benign clinical course. The membranous lesions were associated with a vacuolization visible in obliquely or tangentially cut segments of the GBM in silver-stained paraffin sections. This alteration seemed to be created by irregularities of the argyrophilic lamina densa of the GBM and not by subepithelial deposits, as suggested previously. All seven patients had a remission of the nephrotic syndrome which appeared to be spontaneous and not drug-induced. The amount of proteinuria correlated with the ultrastructural phase of MGN and with the intensity of immunofluorescent staining. In one patient, the latter became negative.
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