In children being evaluated for acute appendicitis, the absence of certain sonographic signs might allow expectant management for those at low or intermediate risk, even if the appendix is not seen.

OAK BROOK, Ill.-- Magnetic resonance imaging (MRI) can help rule out acute appendicitis in pregnancy when ultrasound findings are inconclusive, according to a study in the March issue of Radiology.

Case #1: A 5-year-old boy with abdominal pain was brought to the ED by his parents. The pain had been present for 12 hours, and the child had vomited once. There was no fever or diarrhea. Tenderness ...