Frequency of complications of diseases of the gastroduodenal zone and their prediction

Chronic gastritis and peptic ulcer of the stomach and duodenum are the most common diseases of the gastroduodenal zone, have common pathogenetic mechanisms and clinical and laboratory changes. Complications of diseases of the upper gastrointestinal tract include bleeding, perforation, penetration, stenosis, malignancy. The article presents a review of the literature data and our own results of the study of the frequency and nature of complications of diseases of the gastroduodenal zone, prognostic markers.