[Fiber gastroscopy as the first stage in screening for diseases of the upper gastrointestinal tract].

The article presents data of 284 out of 3400 endoscopic investigations as a method of primary examination in screening of pathology of the upper parts of the gastro-intestinal tract. They show advantages of screening gastroscopy over multistage screening investigations and generally accepted clinico-instrumental tests in forming the groups of risk in oncology and surgical gastroenterology.