Pediatric Imaging for Suspected Appendicitis

Initial Imaging Approach

• The American College of Pediatricians recommends ultrasound as the first-line imaging study in children with suspected appendicitis due to its lack of radiation exposure, wide availability, and good accuracy when results are definitive 1, 4
• When ultrasound results are definitively positive or negative, the sensitivity approaches 99% and specificity is excellent 5

Management of Equivocal Ultrasound Results

• When ultrasound results are equivocal or non-diagnostic and clinical suspicion persists, the next step should be either MRI or CT imaging rather than repeating ultrasound 1, 2, 3
• CT with IV contrast is usually appropriate for follow-up imaging, though CT without IV contrast may also be appropriate in certain situations 1, 2
• MRI is a radiation-free alternative that should be considered, particularly in settings where it is readily available, though it may require sedation in young children 1, 5

Pitfalls and Considerations

• If there is strong clinical suspicion for appendicitis after equivocal imaging, exploratory laparoscopy or laparotomy may be considered if subsequent imaging would delay appropriate management 1, 3