[Current problems of glomerulonephritis (author's transl)].

Setting out with the theory of glomerulonephritis from Volhard and Fahr (1914) and the fundamental patho-anatomical examinations on this subject by Theodor Fahr (1925, 1934) the actual problems of glomerulonephritis are described. Progress in nephropathology and immunopathology which was partly conditioned by progress in the methodical fields has come to the result that, nowadays, an appropriate characterization of glomerulonephritic diseases is only possible by the synopsis of the three categories: Immunopathogenesis, pathomorphology and clinic. Each of these categories has its own classification. The nosology of the various GN types results from the (constant or variable) combination of the components of these three systems. By this means, some known types of glomerulonephritis were confirmed, some were newly defined, and new entities with variable clinical relevance were layed bare. Because immunopathogenetic events very often induce characteristic structural alterations in the glomeruli, it is the pathomorphological nomenclature which -- as pars pro toto -- still is the best suited for common interchange.