Keywords: Medicine and Nursing ; gastric cancer ; biliopancreatic reflux ; gastritis ; carcinoma ; endoscopic surveillance ; Helicobacter pylori infection ; gastric stump cancer ; Helicobacter pylori ; H. pylori ; rifabutin ; treatment ; eradication failure ; culture ; bismuth ; rescue ; Hp-EuReg ; third-generation ultrathin endoscope ; transnasal endoscopy ; narrow-band imaging ; Kyoto classification of gastritis ; gastric atrophy and intestinal metaplasia ; diagnosis ; stool antigen test ; urea breath test ; peptic ulcer disease ; triple therapy ; vonoprazan ; dyspepsia ; Kyoto Classification of Gastritis ; cagA ; Okinawa ; endoscopic findings ; Helicobacter infection ; tetracycline ; eradication ; penicillin allergy ; furazolidone ; metronidazole ; amoxicillin ; child ; host genetic factor ; iron deficiency anemia ; iron demand ; iron uptake ; sports activity ; virulence factor ; gastric lymphoma ; MALT lymphoma ; radiotherapy ; chemotherapy ; rituximab ; dual therapy ; vonoprazan (VPZ) ; amoxicillin (AMOX) ; clarithromycin (CAM)