Intussusception is one of the most common causes of acute abdomen in the first year of life. Its clinical presentation is vomiting, bloody stools, severe colicky abdominal pain, and mass. The authors reported a case of intussusception with an inappropriate clinical picture, but both characteristic ultrasonography and computed tomography findings led to the diagnosis of ileo-ileal intussusception. (C) 2004 Elsevier Inc. All rights reserved.