Etiology and pathogenesis of Glomerulonephritis Primary GN-- limited in kidney along Secondary gn-- associated with systemic diseases Primary GN: A group of hypersensitivity diseases Glomerular injury coused by immune complexes Two forms of abtibody associalted injury Circulating immune complex nephritis Immune complex nephritis in situ二. Etiology and Pathogenesis of Glomerulonephritis Primary GN --- limited in kidney along Secondary GN --- associated with systemic diseases •Circulating immune complex nephritis •Immune complex nephritis in situ Primary GN: A group of hypersensitivity diseases Glomerular injury coused by immune complexes Two forms of abtibody associalted injury