[Epithelial-stromal interrelations in mammary gland tumors induced by 7,12-dimethylbenzanthracene in rats].

: DMBA-induced mammary tumours in rats are mixed adenocarcinomas with various growth rate (rapid, slow and stabilized). The electron-microscopic study has shown that ultrastructure of tumours and their growth rate depend on a degree of the parenchyma cell differentiation and on the maturity of connective tissue being the result of their specific interaction.