[Possibilities of present-day research methods in the diagnosis of precancerous changes in the mucous membrane and "minor" endophytic gastric cancer].

Complex x-ray, endoscopic and morphologic examinations of the stomach carried out in 1250 patients revealed 152 cases with precancer mucosal changes (epithelial dysplasia, intestinal metaplasia). X-ray and endoscopic signs are described which permit suspect precancer changes in the gastric mucosa and "minor" endophytic cancer. Dysplasia progress was observed in 15.5% of cases, no progress in 21.1%. The diagnosis of such conditions should be complex. High-risk groups should be formed with due consideration for both the morphologic criterion and the x-ray and endoscopic signs of gastric wall involvement.