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[Subdivision of certain morphological variants of chronic glomerulonephritis].

Modern methods allow to detail morphological classification of chronic glomerulonephritis, to adapt it to the clinical classification and to recommend it for practical use. This specification concerns minimal changes and a group of mesangial chronic glomerulonephritis. The term "minimal changes" is a light-microscopic definition and covers rather a heterogeneous group of diseases or their initial manifestations. Differential diagnosis of these diseases is feasible only at the electron microscopic level. A group of chronic glomerulonephritis (mesangioproliferative and mesangiocapillary) includes variants distinguished on the basis of immunohistochemical, light microscopic and electron microscopic methods. Of them, the immunohistochemical method is most valuable for differentiation of mesangioproliferative glomerulonephritis.