Acute Abdominal Pain
(<72 hours)
Diffuse
Look for surgical abdomen
Upper quadrant: R/O cardiac, pulmonary, renal, musculoskeletal causes
Lower quadrant: R/O genitourinary causes
Peritonitic Non-Peritonitic
Localized
• Bowel Obstruction
• Viscus Perforation
• Ruptured abdominal aortic aneurysm
• Pancreatitis (1,2)
• Gastroenteritis
• Constipation
• Mesenteric ischemia 
• Peptic ulcer disease
• Metabolic disease (e.g., Diabetic Ketoacidosis)
• Sickle cell anemia (1,2)
• Musculoskeletal
• Trauma
• Irritable bowel syndrome