Gastroesophageal reflux disease (GERD)
Peptic ulcer disease with or without perforation
Gastritis<unk> 
Gallbladder disease
Acute cholecystitis
Cholangitis
Symptomatic cholelithiasis
Acalculous cholecystitis
Myocardial Ischemia
Splenic Infarctionenlargement/rupture/aneurysm
Pericarditis/Myocarditis
Aortic dissection
Hepatitis
Pyelonephritis
Pneumonia
Pyogenic liver abscess
Fitz-Hugh-Curtis Syndrome
Hepatomegaly due to CHF
Bowel obstruction
SMA syndrome
Pulmonary embolism
Bezoar
Ingested foreign body
Acute cholecystitis
Cholangitis
Symptomatic cholelithiasis
Acalculous cholecystitis
Abdominal aortic aneurysm
Aortocaval fistula
Acute gastroenteritis
Aortoenteric fisulta<unk> pendicitis (early)
Bowel obstruction
Large bowel obstruction
Ogilvie's syndrome
Small bowel obstruction
Malignant bowel obstruction
Bowel perforation
Gastroparesis
Diabetic ketoacidosis
Hernia
Inflammatory bowel disease
Mesenteric ischemia
Mesenteric vein thrombosis<unk> 
Peritonitis
Sickle cell crisis
Spontaneous bacterial peritonitis
Volvulus
Aortocaval fistula
Large bowel obstruction
Ogilvie's syndrome
Small bowel obstruction
Malignant bowel obstruction
Ogilvie's syndrome
Mesenteric vein thrombosis
Acute pancreatitis
Gastroesophageal reflux disease 
Acute calculous cholecystitis
Peptic ulcer disease with or without perforation
Chronic pancreatitis
Gastritis
Duodenal hematoma
Pancreatitis