[Jejuno-jejunal invagination after Dennis tube insertion for ileus--a rare complication].

In contrast to childhood intussusception, the clinical signs of intussusception in adults are nonspecific. Generally organic alterations of the small bowel cause intussusception in adults. In this case report on a retrograde jejunojejunal intussusception in a 61-year-old male, following removal of an intraoperatively placed intestinal tube for ileus therapy, the clinical symptoms, diagnostic methods and therapy for intussusception are described. Sonography is not only the diagnostic tool of choice in children, but also led to the correct diagnosis in this case. In contrast to childhood intussusception, operative treatment is preferred in adults.