[Ultrastructural and ultracytochemical study of the tumor cells in stomach cancer].

The report deals with the ultrastructural cell patterns of gastric carcinoma and electron-microscopy study of the histochemical features of cells. The histochemical features of tumor cells were compared with homologous normal epithelial cells. The localization and activity of ATP-ase, IDP-ase, acid and alkaline phosphatases were studied. The data obtained suggest a structural and functional reorganization in the cells of human stomach tumors. It was also found that the histological and ultrastructural differentiation and the degree of functional maturity of tumor cells do not necessarily coincide.