Surgical Gastrointestinal Disorders in Children: Infantile Hypertrophic Pyloric Stenosis, Duodenal Atresia, Intussusception, Hirschsprung Disease in Paediatrics
Paediatrics

Surgical Gastrointestinal Disorders in Children: Infantile Hypertrophic Pyloric Stenosis, Duodenal Atresia, Intussusception, Hirschsprung Disease in Paediatrics

Mar 9, 2026 4 min read 20 MCQs included

Here is a concise but detailed paediatrics reference on Surgical Gastrointestinal Disorders in Children covering:

Infantile Hypertrophic Pyloric Stenosis (IHPS), Duodenal Atresia, Intussusception, and Hirschsprung Disease.

Surgical GI Disorders in Children (Paediatrics)

1. Infantile Hypertrophic Pyloric Stenosis (IHPS)

Definition

Infantile hypertrophic pyloric stenosis is a condition in which hypertrophy of the pyloric muscle causes gastric outlet obstruction in infants. ([NCBI][1])

Epidemiology

  • Occurs in 1–4 per 1000 live births
  • Male predominance (4:1)
  • Usually presents 3–6 weeks of age

Etiology and Risk Factors

Exact cause unknown, but associated with:

  • First-born infants
  • Bottle feeding
  • Macrolide exposure (e.g., erythromycin)
  • Family history
  • Male gender ([NCBI][1])

Pathophysiology

  • Progressive hypertrophy and hyperplasia of pyloric circular muscle
  • Leads to narrowed pyloric canal
  • Gastric emptying obstruction
  • Results in vomiting and dehydration

Clinical Features

Classic triad:

  1. Projectile non-bilious vomiting
  2. Palpable “olive-shaped” mass in epigastrium
  3. Visible gastric peristalsis

Other features:

  • Dehydration
  • Weight loss
  • Hungry baby after vomiting

Investigations

  1. Ultrasound (diagnostic test of choice)

* Pyloric muscle thickness >3 mm

* Length >15 mm

  1. Blood tests

* Hypochloremic hypokalemic metabolic alkalosis

Differential Diagnosis

  • Gastroesophageal reflux
  • Pylorospasm
  • Sepsis
  • Duodenal obstruction

Management

Initial stabilization

  • Correct dehydration
  • Correct electrolyte imbalance
  • Nasogastric decompression

Definitive treatment

Ramstedt pyloromyotomy

  • Longitudinal incision of pyloric muscle

Complications

  • Severe dehydration
  • Shock
  • Failure to thrive

2. Duodenal Atresia

Definition

Duodenal atresia is a congenital obstruction of the duodenum due to failure of recanalization during fetal development. ([NCBI][2])

Epidemiology

  • Occurs in 1 in 6000 live births
  • Frequently associated with Down syndrome
  • Often associated with congenital heart disease

Pathophysiology

During 8–10 weeks gestation, the duodenum should recanalize.

Failure of recanalization leads to:

  • Complete obstruction
  • Proximal dilation of stomach and duodenum

Clinical Features

Usually present within first 24–48 hours of life

Symptoms:

  • Bilious vomiting
  • Upper abdominal distension
  • Failure to tolerate feeds
  • Polyhydramnios during pregnancy

Investigations

X-ray abdomen

  • Classic “double bubble sign”

(stomach + duodenum dilation) ([Medscape eMedicine][3])

Other:

  • Prenatal ultrasound
  • Contrast study

Differential Diagnosis

  • Annular pancreas
  • Malrotation with volvulus
  • Jejunal atresia

Management

Preoperative

  • Nasogastric decompression
  • IV fluids
  • Correct electrolytes

Definitive treatment

Duodenoduodenostomy

Complications

  • Malnutrition
  • Sepsis
  • Postoperative obstruction

3. Intussusception

Definition

Intussusception is the telescoping of one segment of intestine into another, causing intestinal obstruction. ([www.slideshare.net][4])

Most common type:

Ileocolic

Epidemiology

  • Most common cause of intestinal obstruction in 6 months – 3 years
  • Peak age: 6–18 months

Etiology

Primary (most common)

  • No identifiable cause

Secondary lead points:

  • Meckel diverticulum
  • Polyps
  • Lymphoid hyperplasia
  • Tumors

Pathophysiology

  • Proximal bowel invaginates into distal bowel
  • Mesentery compressed
  • Venous congestion
  • Bowel ischemia

Clinical Features

Classic triad

  1. Colicky abdominal pain
  2. Currant jelly stool (blood + mucus)
  3. Palpable sausage-shaped mass

Other symptoms:

  • Vomiting
  • Lethargy
  • Abdominal distension

Investigations

  1. Ultrasound

* “Target sign”

* “Doughnut sign”

  1. Abdominal X-ray

* Signs of obstruction

Management

Non-surgical reduction

First line:

  • Air enema
  • Barium enema

Success rate: ~80–90%

Surgical management

Indications:

  • Failed enema reduction
  • Perforation
  • Peritonitis

Procedure:

  • Manual reduction or bowel resection

Complications

  • Bowel necrosis
  • Perforation
  • Peritonitis
  • Recurrence

4. Hirschsprung Disease (Congenital Megacolon)

Definition

Hirschsprung disease is a congenital disorder characterized by absence of ganglion cells in the distal colon, causing functional intestinal obstruction. ([Mayo Clinic][5])

Epidemiology

  • Occurs in 1 in 5000 births
  • Male predominance
  • Associated with Down syndrome

Pathophysiology

During fetal development:

  • Neural crest cells migrate to form enteric ganglia.

Failure of migration causes:

  • Aganglionosis
  • Affected bowel cannot relax
  • Functional obstruction
  • Proximal colon dilation (megacolon)

Types

  1. Short segment (rectosigmoid) – most common
  2. Long segment
  3. Total colonic aganglionosis

Clinical Features

Neonates

  • Failure to pass meconium within 48 hours
  • Abdominal distension
  • Bilious vomiting
  • Constipation

Infants/children

  • Chronic constipation
  • Poor weight gain
  • Abdominal distension

Complication

Hirschsprung-associated enterocolitis

  • Fever
  • Diarrhea
  • Sepsis risk

Investigations

  1. Rectal biopsy (gold standard)

* Absence of ganglion cells

  1. Contrast enema

* Transition zone

  1. Anorectal manometry

* Absence of rectoanal inhibitory reflex

Management

Initial management

  • Rectal washouts
  • IV fluids
  • Antibiotics if enterocolitis

Definitive surgery

Pull-through procedure

Types:

  • Swenson
  • Duhamel
  • Soave

Procedure:

  • Remove aganglionic segment
  • Anastomose normal bowel to anus

Complications

  • Enterocolitis
  • Anastomotic leak
  • Constipation
  • Fecal incontinence

Quick Comparison Table

| Disease | Age of Presentation | Key Symptom | Diagnostic Sign | Treatment |

| -------------------- | ------------------- | ---------------------------------- | ----------------------- | -------------------- |

| IHPS | 3–6 weeks | Projectile non-bilious vomiting | Olive mass / ultrasound | Pyloromyotomy |

| Duodenal Atresia | Neonate | Bilious vomiting | Double bubble sign | Duodenoduodenostomy |

| Intussusception | 6–18 months | Colicky pain + currant jelly stool | Target sign | Air/Barium enema |

| Hirschsprung Disease | Neonate | Delayed meconium | Rectal biopsy | Pull-through surgery |

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[1]: https://www.ncbi.nlm.nih.gov/books/NBK555931/?utm_source=chatgpt.com "Pyloric Stenosis - StatPearls - NCBI Bookshelf"

[2]: https://www.ncbi.nlm.nih.gov/books/NBK470548/?utm_source=chatgpt.com "Duodenal Atresia and Stenosis - StatPearls - NCBI Bookshelf"

[3]: https://emedicine.medscape.com/article/932917-overview?utm_source=chatgpt.com "Pediatric Duodenal Atresia"

[4]: https://www.slideshare.net/slideshow/4management-of-ihps-and-intussusceptionpptx/267096116?utm_source=chatgpt.com "4.Management of IHPS and Intussusception.pptx"

[5]: https://www.mayoclinic.org/diseases-conditions/hirschsprungs-disease/symptoms-causes/syc-20351556?utm_source=chatgpt.com "Hirschsprung's disease - Symptoms & causes"

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Frequently Asked Questions

The most common surgical gastrointestinal disorders in children include infantile hypertrophic pyloric stenosis, duodenal atresia, intussusception, and Hirschsprung disease. These conditions often cause intestinal obstruction, vomiting, abdominal distension, and feeding intolerance in infants and young children and usually require surgical or interventional management.
Infantile hypertrophic pyloric stenosis is a condition in which the pyloric muscle between the stomach and duodenum becomes abnormally thick, causing gastric outlet obstruction. It typically presents in infants aged 3 to 6 weeks with projectile non-bilious vomiting, dehydration, weight loss, and a palpable olive-shaped mass in the abdomen.
The classic symptoms of pyloric stenosis include projectile non-bilious vomiting after feeding, persistent hunger after vomiting, dehydration, weight loss, visible gastric peristalsis, and a palpable olive-shaped mass in the upper abdomen.
The definitive treatment for infantile hypertrophic pyloric stenosis is Ramstedt pyloromyotomy, a surgical procedure that splits the hypertrophied pyloric muscle to relieve the obstruction. Before surgery, dehydration and electrolyte imbalances must be corrected.
Duodenal atresia is a congenital condition in which the duodenum is completely obstructed due to failure of recanalization during fetal development. It usually presents in newborns with bilious vomiting soon after birth and is often associated with Down syndrome.
The double bubble sign is a classic radiological finding seen on abdominal X-ray in duodenal atresia. It represents two air-filled bubbles, one in the stomach and the other in the proximal duodenum, with absence of gas in the distal intestine.
Intussusception is a condition in which one segment of the intestine telescopes into another segment, leading to bowel obstruction and compromised blood flow. It is one of the most common causes of intestinal obstruction in infants between 6 months and 3 years of age.
The classic triad of intussusception includes intermittent severe abdominal pain, currant jelly stools containing blood and mucus, and a palpable sausage-shaped abdominal mass. Other symptoms may include vomiting, lethargy, and abdominal distension.
The first-line treatment for intussusception in stable children is non-surgical reduction using an air or contrast enema under imaging guidance. If this method fails or complications like perforation or peritonitis occur, surgical intervention is required.
Hirschsprung disease is a congenital disorder characterized by absence of ganglion cells in the distal colon, resulting in functional intestinal obstruction. The affected bowel cannot relax, causing severe constipation and dilation of the proximal colon.
Typical signs include failure to pass meconium within the first 48 hours of life, abdominal distension, bilious vomiting, chronic constipation, and poor feeding.
The gold standard for diagnosing Hirschsprung disease is a rectal suction biopsy that demonstrates absence of ganglion cells in the intestinal wall. Other supportive investigations include contrast enema and anorectal manometry.
The definitive treatment is a pull-through surgery in which the aganglionic segment of the colon is removed and the normal ganglionated bowel is connected to the anus to restore normal bowel function.
A serious complication is Hirschsprung-associated enterocolitis, which presents with fever, abdominal distension, explosive diarrhea, and can lead to sepsis if untreated.
Many surgical gastrointestinal disorders in children can rapidly lead to bowel obstruction, dehydration, electrolyte imbalance, intestinal ischemia, or perforation. Early diagnosis and timely surgical intervention are essential to prevent life-threatening complications.
Related Topics
surgical gastrointestinal disorders in children paediatric gi disorders infantile hypertrophic pyloric stenosis IHPS paediatrics duodenal atresia intussusception in children hirschsprung disease congenital intestinal obstruction pediatric bowel obstruction neonatal intestinal obstruction pediatric surgery gi disorders hypertrophic pyloric stenosis symptoms double bubble sign duodenal atresia currant jelly stool intussusception congenital megacolon hirschsprung disease neonatal vomiting causes pediatric gastrointestinal surgery intestinal obstruction in infants pediatric abdominal emergency pediatric digestive disorders
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