Which symptom is characteristic of intussusception in children?

Intussusception is a condition in which a part of the intestine telescopes into an adjacent segment, causing obstruction. One of the hallmark symptoms of intussusception in children is severe abdominal pain that often comes and goes. This pain is typically accompanied by "currant jelly" stools, which are a result of the obstruction leading to blood and mucus mixing in the stool, creating a dark red, jelly-like appearance. The presence of this specific type of stool is a strong indicator of intussusception and is a critical symptom for healthcare providers to recognize.

The other symptoms listed, such as chronic diarrhea or weight gain with increased appetite, do not align with the characteristics or typical presentations of intussusception. Vomiting with yellow bile may occur in many gastrointestinal issues but lacks the specificity and distinctiveness that "currant jelly" stools provide in diagnosing intussusception. Recognizing this unique symptom enables timely intervention, which is crucial for preventing complications associated with this condition.