When an intestine folds like a telescope, it becomes a medical emergency for children.

Health · Published 3 October 2026 Swipe more like this →

In short: Intussusception occurs when one segment of the intestine slips inside another, creating a dangerous obstruction. While often mysterious in origin, this telescoping action can cut off blood flow, leading to severe tissue damage. Recognizing the sudden, intermittent abdominal pain is critical for preventing life-threatening complications like peritonitis.

Intussusception is a condition where a portion of the intestine prolapses into the segment immediately ahead of it, driven by the natural peristaltic contractions of the bowel. This telescoping action, which most commonly involves the ileum entering the cecum in children, creates a physical blockage that prevents the passage of digested food. If the obstruction persists, the trapped segment of the bowel can suffer from ischemia, as its blood supply is compressed. This lack of oxygen causes the intestinal lining to slough off, often resulting in the passage of stool mixed with blood and mucus, sometimes described as having a red currant jelly appearance.

In children, the condition is most prevalent between the ages of three months and six years, with the majority of cases occurring in those under two years old. Boys are affected significantly more often than girls. While the exact cause remains unknown in most pediatric cases, some experts suspect that viral infections—which often spike during fall and winter—may play a role. In a minority of cases, an anatomical lead point, such as a polyp or Meckel diverticulum, acts as a focal area of traction that the intestine pulls into itself. In contrast, adult intussusception is rare and typically linked to identifiable underlying conditions like tumors, adhesions, or inflammatory bowel disease.

Diagnosis often relies on physical examination, where a sausage-shaped mass may be palpable, and imaging studies. Ultrasound is the preferred diagnostic tool, frequently revealing a characteristic target-like or doughnut-shaped sign. Treatment for children often involves an air or contrast enema, where the pressure of the fluid or gas can successfully reduce the telescoping bowel. If this procedure fails, or if the bowel is damaged, surgical intervention is required to manually reduce the segment or remove the necrotic tissue. Because untreated cases can lead to perforation and sepsis, prompt medical evaluation is essential whenever unexplained, episodic abdominal pain occurs.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

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