Abdominal compartment syndrome
Abdominal pain, chronic lower
Abdominal pain, nonsurgical causes
Achalasia
Acute colonoic pseudo-obstruction
Acute liver failure
Alcoholic hepatitis
Anal abscess and fistula
Anorectal fistula
Anorexia
Appendicitis
Ascariasis
Ascites
Autoimmune hepatitis
Bacterial overgrowth, small intestine
Barrett’s esophagus
Bile duct, dilated
Bleeding, gastrointestinal, algorithm
Bleeding, rectal
Bleeding, variceal
Budd-Chiari syndrome
Calcifications, liver on x-ray
Calcifications, pancreas on x-ray
Calcifications, spleen on x-ray
Celiac disease
Cholangitis
Cholecystitis
Cholelithiasis
Cholera
Chronic pancreatitis
Cirrhosis
Cirrhosis, primary biliary
Colic, acute abdominal
Colorectal cancer
Colostridium difficile infection
Constipation, adult patient
Constipation, algorithm
Crohn’s disease
Cryptosporidium infection
Cyclic vomiting syndrome
Delayed passage of meconium
Diarrhea, acute
Diarrhea, acute watery and bloody
Diarrhea, chronic
Diarrhea, chronic, in patients with HIV infection, algorithm
Diarrhea, infectious
Diarrhea, non-infectious
Diverticular disease (diverticulosis, diverticulitis)
Dumping syndrome
Dyspepsia
Dyspepsia, nonulcerative
Dysphagia, oropharyngeal
Echinococcosis
Epigastric pain
Epiploic appendagitis
Esophageal tumors
Esophageal varices
Esophagitis
Familial adenomatous polyps and Gardner’s syndrome
Fetal alcohol syndrome
Food poisoning, bacterial
Functional gallbladder disorder
Gastric cancer
Gastric dilatation
Gastric emptying, delayed
Gastrinoma
Gastritis
Gastroenteritis
Gastroesophageal reflux disease
Giardiasis
Gilbert’s disease
Glossitis
Glossodynia
Helicobacter pylori infection

Hematemesis
Hemochromatosis
Hemoperitoneum
Hemoptysis
Hemorrhoids
Hepatic encephalopathy
Hepatitis A
Hepatitis, acute
Hepatitis B
Hepatitis B prophylaxis
Hepatitis C
Hepatitis, viral
Hepatomegaly, algorithm
Hepatomegaly, by shape of liver
Hepatopulmonary syndrome
Hepatorenal syndrome
Hiatal hernia
Hookworm
Hypergastrinemia
Hypersplenism, associated conditions
Hypoglycemia
Incontinence, fecal
Irritable bowel syndrome
Ischemia, colon
Jaundice, classification
Jaundice in the adult patient
Jaundice, neonatal
Jaundice, neonatal, algorithm
Lactose intolerance
Large bowel stricture
Liver abscess
Liver disease, pregnancy
Liver lesions, benign
Lynch syndrome
Malabsorption
Malabsorption algorithm
Mallory-Weiss tear
Nonalcoholic fatty liver disease
Nutrition assessment and intervention in cancer patient
Odynophagia
Pancreatic calcifications
Pancreatic cancer (exocrine)
Pancreatitis, drug-induced
Peptic ulcer disease
Perianal pain
Peritonitis, secondary
Peutz-Jeghers syndrome and other polyposis syndromes
Pinworms
Pneumatosis intestinalis in neonate and older child
Portal hypertension
Portal vein thrombosis
Primary sclerosing cholangitis
Pruritus ani
Rectal mass, palpable
Rectal prolapse
Retropharyngeal abscess
Shigellosis
Short bowel syndrome
Small bowel masses
Small bowel obstruction
Small intestinal bacterial overgrowth
Small intestine ulceration
Spontaneous bacterial peritonitis
Tapeworm infestation
Toxic megacolon
Traveler’s diarrhea
Tropical sprue
Typhoid fever
Ulcerative colitis
Vitamin deficiency (hypovitaminosis)
Whipple’s disease
Wilson’s disease
Zenker’s (pharyngoesophageal) diverticulum