Abdominal pain or discomfort
Abdominal distention, tenderness
Rebound, guarding, or rigidity on exam
Anorexia and nausea
Guarding or rebound
Sepsis
Signs of liver failure
Spontaneous bacterial<unk> 
Fever and chills
Abdominal pain or discomfort
Worsening or unexplained encephalopathy
Diarrhea
Ascites
Worsening or new-onset renal failure
Ileus
Fever and chills
Abdominal pain or discomfort
Worsening or unexplained encephalopathy
Diarrhea
Ascites
Worsening or new-onset renal failure
Ileus
Peritonitis
Abdominal aortic aneurysm
Spontaneous bacterial peritonitis
Aortocaval fistula
Appendicitis 
Acute gastroenteritis
Appendicitis
Aortoenteric fisulta