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General Surgery · Paediatric surgery: stricture after necrotising enterocolitis
Sample itemSix weeks after medical treatment of necrotising enterocolitis, a preterm infant develops vomiting and abdominal distension. A contrast study shows a short narrowed segment of the left colon with dilated bowel above it. What is the cause?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Post-inflammatory stricture
Strictures are the commonest late complication of NEC, occurring where ischaemic injury healed by fibrosis. The colon, especially the left side, is often involved. A contrast enema after recovery identifies it, and resection of the segment is usually needed.
Option by option
A. Post-inflammatory stricture (correct)
Correct. Healing of ischaemic injury by fibrosis causes a stricture weeks after NEC.
B. Hirschsprung disease
Hirschsprung disease presents with delayed meconium and a transition zone from birth, not a short focal stricture after NEC.
C. Meconium ileus
Meconium ileus is a neonatal obstruction of cystic fibrosis in the terminal ileum and presents in the first days.
D. Malrotation with volvulus
Malrotation with volvulus presents acutely with bilious vomiting and not with a localised colonic narrowing.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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