Abdominal Angiography
Abdominal Ultrasound
Colonoscopy
Computed Tomography (CT or CAT) Scan of the Abdomen
Contrast X-rays of the Digestive Tract
Endoscopic Retrograde Cholangiopancreatography
Esophageal Manometry
Esophagogastroduodenoscopy
Modified Barium Swallow
Needle Biopsy
Occult Blood in Stool
Radionuclide Scanning of the Liver, Gallbladder, or Stomach
Paracentesis
pH Study
Sigmoidoscopy
