Meconium Ileus

What Is Meconium Ileus?

Meconium ileus is a type of bowel obstruction that occurs in newborns when the meconium — the baby’s first stool — is abnormally thick and sticky, preventing it from passing through the intestines. This condition is often a sign of an underlying disorder such as cystic fibrosis and typically presents within the first few days of life.

Meconium ileus requires prompt medical attention and may need surgical intervention depending on its severity.

Causes and Risk Factors

Meconium ileus is caused by the accumulation of thick meconium in the small intestine, usually the ileum. Nearly all babies with meconium ileus have cystic fibrosis, a genetic disorder that affects the body’s ability to manage mucus and digestive fluids. Other rare causes may include intestinal atresia or congenital anomalies of the gastrointestinal tract.

Signs and Symptoms

Symptoms typically appear shortly after birth and may include:

  • Failure to pass meconium within the first 24–48 hours
  • Abdominal bloating or distension
  • Vomiting, which may be green (bilious)
  • Feeding intolerance or lack of appetite
  • Visible loops of intestine under the skin

Diagnosis

Diagnosis is usually made shortly after birth based on clinical symptoms and confirmed with imaging tests:

  • Abdominal X-rays: Show signs of obstruction, such as dilated bowel loops and air-fluid levels
  • Contrast enema: Helps identify the point of blockage and can sometimes be therapeutic
  • Genetic testing: May be used to confirm cystic fibrosis

Treatment Options

In mild cases, a contrast enema may help break up the thick meconium and relieve the obstruction without surgery. If the enema fails or the baby shows signs of intestinal perforation or volvulus, surgery may be needed to remove the blockage and damaged bowel segments.

Post-operative care includes IV fluids, nutrition support, and monitoring for complications. Long-term care may involve managing cystic fibrosis and digestive enzyme supplementation if diagnosed.

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Frequently Asked Questions

Meconium is the newborn’s first stool, made up of mucus, bile, and skin cells. In meconium ileus, it is unusually thick and sticky, leading to a blockage in the intestines.

Nearly all cases are associated with cystic fibrosis, although the condition can rarely occur in babies without it.

Yes, some cases are resolved using a contrast enema. More severe cases require surgery to remove the blockage.

If linked to cystic fibrosis, ongoing care will be needed. If treated early, most infants recover well from the bowel obstruction itself.

Hospital stay length depends on whether surgery is required and how quickly bowel function returns. NICU care is often needed in the early days.