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Related Experiment Videos

IgA nephropathy with subendothelial deposits

M Hara, Y Endo, H Nihei

    Virchows Archiv. A, Pathological Anatomy and Histology
    |January 1, 1980
    PubMed
    Summary

    IgA nephropathy type 2, with subendothelial deposits, presents intermediate pathology and clinical features between IgA nephropathy type 1 and MPGN. This suggests a clinicopathological overlap in IgA nephropathy and MPGN with IgA deposition.

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    Area of Science:

    • Nephrology
    • Pathology
    • Immunology

    Background:

    • IgA nephropathy (IgAN) is a primary glomerulonephritis.
    • Subendothelial deposits characterize IgA nephropathy type 2 and membranoproliferative glomerulonephritis (MPGN).

    Purpose of the Study:

    • To compare IgA nephropathy type 2 with IgA nephropathy type 1 and MPGN.
    • To investigate clinicopathological differences and similarities.

    Main Methods:

    • Histometric and clinical comparison of 32 biopsies (IgAN type 1), 25 biopsies (IgAN type 2), and 31 biopsies (MPGN).
    • Analysis of glomerular mesangial matrix, hypercellularity, mesangial thickening progression, proteinuria, and renal function impairment.

    Main Results:

    • IgAN type 2 showed higher mesangial matrix increase and hypercellularity than IgAN type 1 (P < 0.05).
    • MPGN exhibited more severe mesangial changes than both IgAN types (P < 0.001).
    • Mesangial thickening progressed in IgAN type 2 and MPGN, but not in IgAN type 1. Proteinuria and renal impairment were progressive from IgAN type 1 to IgAN type 2 to MPGN.

    Conclusions:

    • IgA nephropathy type 2 is pathologically and clinically intermediate between IgA nephropathy type 1 and MPGN.
    • A clinicopathological overlap exists between IgA nephropathy and MPGN with IgA deposition.

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