Simultaneous fiberoptic colonoscopy and esophago-gastro-duodenoscopy.
D003113:Colonoscopy; D004384:Duodenoscopy; D004724:Endoscopy; D004945:Esophagoscopy; D005767:Gastrointestinal Diseases / Q000175:diagnosis; D005773:Gastroscopy; D006801:Humans