Treat alcohol-induced liver disease with alcohol cessation. Manage chronic diarrhea caused by malabsorption of sugar-free sweeteners. Treat spontaneous bacterial peritonitis. Evaluate dyspepsia with alarm features. Evaluate for ulcerative colitis in a patient with primary sclerosing cholangitis. Diagnose pill-induced esophagitis. Diagnose constrictive pericarditis as a cause of ascites. Manage upper gastrointestinal bleeding caused by a high-risk ulcer. Treat acute kidney injury in the context of cirrhosis with a colloid fluid challenge. Manage acute cholangitis. Provide the appropriate prevention strategy for NSAID-induced injury. Treat chronic pancreatitis with pancreatic enzymes. Evaluate for celiac disease in a patient with chronic diarrhea. Diagnose Helicobacter pylori infection in a patient at high risk using the appropriate test. Manage gallbladder polyps. Treat Crohn disease in a pregnant patient. Diagnose irritable bowel syndrome. Diagnose Wilson disease presenting as acute liver failure. Treat acute pancreatitis caused by gallstones. Treat functional dyspepsia. Manage nonalcoholic fatty liver disease. Provide colon cancer surveillance in a patient with ulcerative colitis. Manage diverticulitis. Provide colonoscopy surveillance following a diagnosis of a serrated polyp. Manage asymptomatic cholelithiasis. Diagnose pyoderma gangrenosum as an extraintestinal manifestation of inflammatory bowel disease. Evaluate chronic diarrhea. Treat autoimmune pancreatitis. Treat small-bowel bleeding with push enteroscopy. Treat irritable bowel syndrome with constipation that is refractory to standard laxative therapy. Diagnose fat-soluble vitamin deficiency following malabsorptive bariatric surgery. Manage advanced liver disease due to nonalcoholic fatty liver disease. Provide surveillance for Barrett esophagus without dysplasia. Diagnose primary biliary cirrhosis. Evaluate obscure gastrointestinal bleeding with capsule endoscopy. Treat acute pancreatitis with enteral nutrition. Manage lower gastrointestinal bleeding caused by an anal fissure. Treat a hepatocellular adenoma. Treat Candida esophagitis. Treat constipation due to dyssynergic defecation with biofeedback therapy. Manage sporadic fundic gland polyps. Provide long-term prevention of recurrent NSAID-induced peptic ulcer disease. Diagnose Crohn colitis. Diagnose chronic mesenteric ischemia. Screen for hereditary nonpolyposis colon cancer. Manage chronic hepatitis B infection in the inactive carrier state. Screen for celiac disease in a patient with symptoms of irritable bowel syndrome with diarrhea. Diagnose the cause of obscure gastrointestinal bleeding with repeat upper endoscopy. Evaluate chest pain with an exercise stress test in a patient with suspected gastroesophageal reflux disease. Treat chronic hepatitis C virus infection. Perform ambulatory pH impedance monitoring for gastroesophageal reflux disease in a patient whose symptoms did not respond to proton pump inhibitor therapy. Diagnose lymphocytic colitis. Diagnose nonocclusive mesenteric ischemia. Manage decompensated cirrhosis with referral for liver transplantation. Manage gallstone disease during pregnancy with surgery. Diagnose peptic ulcer disease as the cause of upper gastrointestinal bleeding. Manage a curable malignant polyp. Diagnose and treat small-bowel bleeding with angiography. Manage acalculous cholecystitis. Manage upper gastrointestinal bleeding caused by a low-risk gastric ulcer. Manage hepatocellular carcinoma in a patient who meets the Milan criteria. Evaluate a patient with a positive hepatitis C virus (HCV) antibody test and a negative HCV RNA test. Perform genetic testing to evaluate the inheritance pattern of MYH-associated polyposis. Provide antibiotic prophylaxis for variceal hemorrhage in a patient with cirrhosis but without ascites. Diagnose celiac disease in a patient with abnormal liver chemistry studies. Diagnose a common bile duct stone. Manage gastroparesis. Treat non–acetaminophen-related acute liver failure with N-acetylcysteine. Diagnose eosinophilic esophagitis. Recommend surveillance upper endoscopy in a patient with familial adenomatous polyposis. Manage acute hepatitis B. Manage pain in chronic pancreatitis using a gabapentinoid. Treat gastroesophageal reflux disease in a patient with an incomplete response to once-daily proton pump inhibitor therapy. Treat refractory ulcerative colitis with an anti–tumor necrosis factor agent. Manage upper gastrointestinal bleeding in a patient with cardiovascular disease. Diagnose serrated polyposis syndrome. Evaluate recurrent symptoms with a dietary history in a patient with celiac disease. Treat Helicobacter pylori infection after initial treatment failure. Diagnose Gilbert syndrome. Provide colonoscopy surveillance in a patient with a history of colorectal cancer. Manage gastroesophageal reflux disease with an empiric trial of a proton pump inhibitor. Diagnose ischemic colitis as a cause of lower gastrointestinal bleeding. Provide colonoscopy surveillance following a diagnosis of adenomatous polyps. Diagnose esophageal cancer with upper endoscopy. Manage a gastric neuroendocrine tumor. Diagnose achalasia. Manage small intestinal bacterial overgrowth in a patient with Roux-en-Y gastric bypass. Manage acute diarrhea. Manage a sporadic juvenile polyp. Evaluate oropharyngeal dysphagia with videofluoroscopy. Treat ulcerative colitis with the appropriate maintenance therapy. Provide surveillance for hepatocellular carcinoma in a patient with chronic hepatitis B infection. Manage peptic ulcer bleeding. Treat Barrett esophagus with high-grade dysplasia with endoscopic ablation. Diagnose an insulinoma with endoscopic ultrasound. Treat microscopic colitis.