URMC / Encyclopedia / Collection Gastroenterology Tests and Procedures Barium Swallow Barium Enema Upper Gastrointestinal (GI) Series Upper GI Endoscopy Endoscopic Retrograde Cholangiopancreatography (ERCP) Pancreas Scan Liver Scan Liver Biopsy Colonoscopy PEG Tube Placement Sigmoidoscopy Abdominal X-ray Abdominal Ultrasound CT Scan of the Abdomen CT Scan of the Liver and Biliary Tract CT Scan of the Pancreas Laparoscopy Virtual Colonoscopy for Colorectal Cancer Screening Colectomy Proctectomy