Observation on the Efficacy of Radiofrequency Ablation for Patients With Moderate to Severe Gastric Atrophy With Enterosis With or Without Atrophy of Intraepithelial Neoplasia: An Observational Study

Inclusion Criteria: * Age 18-70 years old, male or female. * Patients who had undergone gastroscopy within 3 months prior to inclusion, and whose histologic diagnosis of chronic gastritis was histologically atrophic enterocolitis graded at moderate-to-severe with or without low-grade intraepithelial neoplasia. * Patients who had undergone gastroscopy within 3 months prior to inclusion, and whose OLGA (atrophic grading and staging criteria for chronic gastritis) or OLGIM (enteric grading and staging criteria for chronic gastritis) staging criteria had reached moderately severe. * Helicobacter pylori negative. Exclusion Criteria: * Pregnant or lactating women. * Previous history of malignant tumors of the digestive tract or history of gastrointestinal surgery. * Malignant tumors of other organs, coagulation disorders, cardiopulmonary insufficiency, hepatic and renal insufficiency, etc. * Those who are unable or unwilling to sign the informed consent form.