Duplication of the alimentary tract with ectopic gastric mucosoa as cause of lower abdominal pain

Duplications of the alimentary tract are rare congenital anomalies, which may be difficult to diagnose. They cause unspecific symptoms and may mimic appendicitis. The authors report the case of a 9-year-old boy with recurrent pain in the right lower abdomen who underwent laparoscopic appendectomy. The painful episodes were, however, caused by a duplication with ectopic gastric mucosa, which had lead to an ulceration and an intussusception. Sonographically using a high resolution linear probe (7.5 MHz) the ileal intussusception could be demonstrated.