Barium Swallow Barium Enema Upper Gastrointestinal Series Esophagogastroduodenoscopy Endoscopic Retrograde Cholangiopancreatography Pancreas Scan Liver Scan Liver Biopsy Colonoscopy PEG Tube Placement Sigmoidoscopy Abdominal X-rays Abdominal Ultrasound Computed Tomography (CT or CAT) Scan of the Abdomen Computed Tomography (CT or CAT) Scan of the Liver and Biliary Tract Computed Tomography (CT) Scan of the Pancreas Laparoscopy Virtual Colonoscopy for Cancer Screening Colectomy Proctectomy