title: Current concepts: gastrointestinal endoscopy.
mesh_terms: D004064:Digestive System; D004378:Duodenal Diseases / Q000175:diagnosis; D004381:Duodenal Ulcer / Q000175:diagnosis; D004386:Duodenum; D004724:Endoscopy / Q000009:adverse effects; D004935:Esophageal Diseases / Q000175:diagnosis; D004945:Esophagoscopy; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging / Q000628:therapy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis; D005773:Gastroscopy; D006801:Humans; D010437:Peptic Ulcer / Q000175:diagnosis; D011859:Radiography; D013272:Stomach Diseases / Q000175:diagnosis