[The morphological characteristics of the nephrotic form of glomerulonephritis in children at puberty].

67 children (from 3 to 18 years of age) and 26 adults (19-30-year-olds) with nephrotic or mixed forms of glomerulonephritis (GN) are studied. The most severe and pleiomorphic forms of GN are found in children of 12 to 15 years of age: mesangio-capillary, mesangial proliferative, extracapillary proliferative GN with "half-moon" structures, sclerosing GN. Pronounced disturbances of the vimentine content and distribution in the basal lamina, of i.v. type collagen, fibronectin in combination with its damage under the influence of various immune deposits (particularly subepithelial ones) are found in these patients.