Intussusception — MCCQE Part 1 MCQ

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ModerateAbdominal PainIntussusceptionMCCQE Part 1

A 9-month-old boy has intermittent severe crying, draws up his legs, vomits and passes red currant-jelly stool; ultrasound shows a target sign. Which of the following is the most appropriate next step?

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Correct answer: A — Arrange air or contrast enema reduction with surgical backup

Arrange air or contrast enema reduction with surgical backup is the single best answer because the age, timing, examination findings and investigations in the vignette fit Intussusception better than the alternatives. The most tempting distractor is less appropriate because it either treats a neighbouring presentation, delays a time-critical intervention, or ignores a key discriminator in the stem. The remaining options are suboptimal because they would miss the diagnosis, use an investigation or treatment in the wrong sequence, or fail to address safety and follow-up. Canadian practice should be anchored to CPS paediatric emergency guidance, with attention to acuity, safety-netting and local provincial pathways.

Reference: CPS paediatric emergency guidance