[Ultrastructure of experimental adenocarcinoma of the rat stomach following long term administration of MNNG].

Gastric tumours were induced in rats by orally administration of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG). The received adenomas and adenocarcinomas were investigated electron microscopically. In this paper we give a short description of main ultrastructural specialities of tumour cells, which can be derived from mucoid surface cells and mucous cells of antropyloric glands.