Gastrointestinal endoscopy.
D002760:Cholangiopancreatography, Endoscopic Retrograde; D003113:Colonoscopy; D004724:Endoscopy; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D005773:Gastroscopy; D006801:Humans; D010535:Laparoscopy; D012812:Sigmoidoscopy