What is the most common cause of intussusception in a child?

The most common cause of intussusception in a child is indeed associated with viral infections, particularly those caused by viruses like adenovirus. This connection is thought to be related to the inflammation and lymphoid hyperplasia that can occur in the intestines following a viral infection. In children, this host of factors can lead to one part of the intestine sliding into an adjacent segment, resulting in intussusception.

Intussusception often presents with symptoms like abdominal pain, bloody stools, and vomiting, and it typically occurs in children aged between six months and three years. Understanding that viral infections can predispose children to this condition helps underscore the importance of recognizing common pediatric illnesses that may be associated with gastrointestinal complications.

While bacterial infections can also affect the gastrointestinal tract and may lead to similar symptoms, they are not recognized as a primary causative factor for intussusception in children. Trauma and allergies do not typically induce this condition in the pediatric population.