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Intussusception — RACP Paediatrics MCQ

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ModerateGastroenterologyIntussusceptionRACP Paediatrics

A 9-month-old has episodic crying, drawing up of the legs and vomiting. Between episodes he appears pale and lethargic. The abdomen is soft, but a sausage-shaped mass is suspected in the right upper quadrant. What is the most likely diagnosis?

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Correct answer: C — Intussusception

Intermittent colicky pain, pallor or lethargy between episodes and a possible abdominal mass are classic for intussusception. Pyloric stenosis presents earlier with progressive non-bilious vomiting rather than episodic pain. Ultrasound is the preferred diagnostic investigation and can guide reduction planning.

Reference: RCH Intussusception guideline; RACP Knowledge Guides