title: Endoscopy of the upper gastrointestinal tract.
mesh_terms: D014670:Ampulla of Vater; D002404:Catheterization; D002758:Cholangiography / Q000009:adverse effects / Q000379:methods; D004378:Duodenal Diseases / Q000175:diagnosis*; D019723:Endoscopes; D004724:Endoscopy / Q000379:methods; D020701:Esophagoscopes; D004945:Esophagoscopy / Q000009:adverse effects / Q000379:methods; D005336:Fiber Optic Technology; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis; D020699:Gastroscopes; D005773:Gastroscopy / Q000009:adverse effects / Q000379:methods; D007565:Jaundice / Q000175:diagnosis; D010179:Pancreas / Q000000981:diagnostic imaging; D010182:Pancreatic Diseases / Q000175:diagnosis