What characterizes intussusception?

Intussusception is characterized by the telescoping of one segment of the intestine into another. This condition typically occurs when a part of the intestine, such as the ileum, folds into itself or into an adjacent segment, leading to obstruction. This "telescoping" mechanism can cause various complications, including compromised blood supply to the affected segment of the intestine, leading to potential ischemia or necrosis if not addressed promptly.

The phenomenon is most commonly seen in young children and can lead to symptoms such as acute abdominal pain, vomiting, and the passage of blood or "currant jelly" stools. The identification of this characteristic is crucial in recognizing the condition early and allows for timely intervention, which often involves imaging and possible surgical intervention to correct the obstruction and prevent further complications.