Oncological diseases of the digestive system cause significant damage to health care and the economy in all countries. Malignant neoplasms of the gastrointestinal tract (gastrointestinal tract) have an extremely high prevalence and are one of the main causes of mortality worldwide. Gastrointestinal cancer is one of the five most commonly diagnosed oncological diseases in both men and women. To date, a number of effective strategies and techniques have been developed aimed at preventing and eliminating the oncological process, and patients with early-stage gastrointestinal cancer, when receiving adequate treatment, reach 90% of five-year survival. However, even today, early diagnosis remains low, modern preventive and screening methods of early diagnosis are not fully used. Universal coverage of the population in the framework of cancer screening is of great socio-economic importanc