Ultrasonographic imaging has been found to have a high sensitivity and specificity in the detection of ileocolic intussusception. Abdominal radiographs can also reveal diagnostic characteristics of intussusception, but their sensitivity and specificity have been called into question. Hallmarks of ultrasonography include the target and pseudokidney signs. One study reported that the overall sensitivity and specificity of ultrasonography for detecting ileocolic intussusception was 97.9% and 97.8%, respectively. The authors concluded that ultrasonography should be used as a first-line examination for the assessment of possible pediatric intussusception.
For more on the workup of intussusception, read here.
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Cite this: Jaime Shalkow. Fast Five Quiz: Are You Prepared to Confront Intussusception? - Medscape - Apr 25, 2016.