[Effect of various casein contents of the diet on nitrosodimethylamine-induced carcinogenesis in rats].

Comparative morphological analysis of the animal groups given 8 and 20% casein in the diet has shown that the general nature and the trend of morphological changes in rat organs, induced by nitrosodimethylamine (NDMA) appeared similar. At the same time the reduction of casein content in the diet from 20 to 8% significantly raised the number of NDMA-induced tumors, changed their sites and times of development.