Tomsen disease is a pathology caused by the reflux of intestinal contents through the esophageal sphincter into the stomach cavity at the level of its distal section. This pathology is diagnosed quite often in gastroenterological practice. Based on their origin, there are 3 types of Thompson's disease: 1- primary (congenital or idiopathic): clinically manifested by gastritis, antral atrophic gastritis without ulcers, deficiency of exocrine pancreatic function of the pancreas, Hirschsprung's disease in children or chronic hyperplastic pyloric gastritis in adults, manifested repeated vomiting and other dyspeptic symptoms; 2- secondary (symptomatic): due to another type of pyloric disorder, such as GERD, Zollinger-Ellison syndrome; 3- caused by a mechanical obstacle - protruding above the level of the pyloroduodenal region with a diameter of 5 cm (usually carcinoma) or external pressure due to space-occupying formations in the posterior mediastinum, as well as iatrogenic effects - damage to the pyloric part of the stomach during operations on the esophagus; less commonly, the causes may be lesions of the pelvic organs, teratocardial hernias. The main clinical and morphological forms of Tomseno's disease are gastric dyskinesia (