II. Causes: Gastrointestinal
III. Causes: Genitourinary
IV. Causes: Miscellaneous
- Leaking Abdominal Aortic Aneurysm
- Abdominal wall Hematoma
- Psoas abscess
V. Evaluation
- Classic Appendicitis or red flags for peritonitis
- Complete Blood Count
- CT Abdomen with IV contrast
- Findings suggest alternative diagnosis
- Evaluate for genitourinary and miscellaneous causes as listed above
VI. Imaging: Preferred
- Abdominal CT with IV contrast