Hirschsprung disease vs Pediatric acute bowel obstruction patterns
How to tell Hirschsprung disease and Pediatric acute bowel obstruction patterns apart when a board question makes them look alike.
Hirschsprung is aganglionic delayed meconium; intussusception is target-sign telescoping; volvulus is bilious twisting emergency.
Side by side
Newborn delayed meconium, abdominal distension, explosive stool after rectal exam, and absent ganglion cells.
Intussusception causes episodic colicky pain, currant jelly stool, and target sign; midgut volvulus causes acute bilious vomiting with twisting/ischemia risk.
Neural crest migration failure leaves distal bowel aganglionic, causing tonic contraction and functional obstruction.
Intussusception telescopes bowel into bowel; volvulus twists malrotated bowel around its mesenteric blood supply.
Rectal biopsy without ganglion cells and transition zone support Hirschsprung disease.
Target sign supports intussusception; whirlpool sign or SMA twisting supports midgut volvulus.
The trap
All three present as pediatric bowel obstruction with abdominal distention and vomiting, so the age, stool pattern, and imaging decide. Failure to pass meconium within 48 hours of birth plus chronic constipation plus 'squirt sign' on rectal exam plus association with Down syndrome equals Hirschsprung disease (absence of ganglion cells in the submucosal Meissner and myenteric Auerbach plexuses; rectal biopsy is the gold standard; treat with surgical resection of the aganglionic segment). Episodic colicky abdominal pain with intervals of comfort plus currant jelly stools plus sausage-shaped right-upper-quadrant mass in a 6-month to 2-year-old equals intussusception (target sign on ultrasound; air or contrast enema is both diagnostic and therapeutic). Bilious vomiting plus acute abdomen in a newborn or young infant equals midgut volvulus (corkscrew sign on upper GI series; emergent Ladd procedure before bowel necrosis).
The repair move
For pediatric obstruction, sort by delayed meconium, episodic telescoping pain, or acute bilious twisting.
Try a free question
CoreA newborn fails to pass meconium, has abdominal distension, and rectal biopsy shows absence of ganglion cells. Which diagnosis is most likely?
Show answer and explanation
Answer: A. Hirschsprung disease. Hirschsprung disease is congenital aganglionosis causing functional distal obstruction and delayed meconium passage.
Why the other choices are tempting
- B. Intussusception causes episodic colicky pain and currant jelly stool in an older infant or child.
- C. Midgut volvulus causes acute bilious vomiting from twisting around the mesenteric axis.
- D. Pyloric stenosis causes nonbilious projectile vomiting after several weeks of life.
- E. Meckel diverticulum classically causes painless lower GI bleeding.
Flashcards
Tap a card to flip it.
What biopsy finding defines Hirschsprung disease?
Absence of ganglion cells in the affected distal bowel defines Hirschsprung disease.
What imaging clue supports intussusception?
A target sign on ultrasound supports telescoping bowel.
Quick answers
What is the fastest way to tell Hirschsprung disease from Pediatric acute bowel obstruction patterns?
Hirschsprung is aganglionic delayed meconium; intussusception is target-sign telescoping; volvulus is bilious twisting emergency.
What is the key clue for Hirschsprung disease?
Newborn delayed meconium, abdominal distension, explosive stool after rectal exam, and absent ganglion cells.
What is the key clue for Pediatric acute bowel obstruction patterns?
Intussusception causes episodic colicky pain, currant jelly stool, and target sign; midgut volvulus causes acute bilious vomiting with twisting/ischemia risk.
What is the common trap with Hirschsprung disease vs Pediatric acute bowel obstruction patterns?
All three present as pediatric bowel obstruction with abdominal distention and vomiting, so the age, stool pattern, and imaging decide. Failure to pass meconium within 48 hours of birth plus chronic constipation plus 'squirt sign' on rectal exam plus association with Down syndrome equals Hirschsprung disease (absence of ganglion cells in the submucosal Meissner and myenteric Auerbach plexuses; rectal biopsy is the gold standard; treat with surgical resection of the aganglionic segment). Episodic colicky abdominal pain with intervals of comfort plus currant jelly stools plus sausage-shaped right-upper-quadrant mass in a 6-month to 2-year-old equals intussusception (target sign on ultrasound; air or contrast enema is both diagnostic and therapeutic). Bilious vomiting plus acute abdomen in a newborn or young infant equals midgut volvulus (corkscrew sign on upper GI series; emergent Ladd procedure before bowel necrosis).