Abdominal pain, abdominal distention / rigidity
Occasionally focal if regionally confined (less common)
Nausea, vomiting, fever, and anorexia often present
Occasionally focal if regionally confined (less common)<unk>  with peritonitis
Abdominal tenderness, distention
Involuntary guarding
Rebound tenderness<unk>  without peritonitis
Abdominal tenderness
Voluntary guarding
Abdominal tenderness, distention
Involuntary guarding
Rebound tenderness
Abdominal tenderness
Voluntary guarding
Sepsis (fever, leukocytosis, tachycardia, hypotension)
Possible sepsis-related end-organ dysfunction (i.e., ARDS, renal failure)
Bowel perforation
Acute myocardial infarction
Large bowel obstruction
Intestinal obstruction
Intestinal ischemia
Acute mesenteric ischemia
Mesenteric ischemia
Mesenteric venous thrombosis