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Partial Duodenal Obstruction — RACP Paediatrics MCQ

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ModerateNeonatologyPartial Duodenal ObstructionRACP Paediatrics

A term neonate with trisomy 21 is found to have a duodenal web on day 2. He has bilious vomiting and a 'double-bubble' on X-ray but with some distal gas. What does the presence of distal gas indicate?

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Correct answer: A — Partial (incomplete) duodenal obstruction (web or stenosis)

Duodenal web causes partial obstruction (double-bubble with SOME distal gas). Complete duodenal atresia shows no distal gas. Both are associated with trisomy 21. Surgical correction (duodenoduodenostomy or web excision) is required.

Reference: RCH Melbourne – 2024 – Clinical Practice Guidelines: Duodenal Obstruction