Noncommunicating isolated enteric duplication cyst in childhood.

Duplications of the alimentary tract are spherical or tubular structures lined by epithelium similar to intestine that are firmly attached to or share the wall of the alimentary tract and have a common blood supply with the adjacent segment of the bowel. Completely isolated duplication cysts are an extremely rare variety of gastrointestinal duplications with their own exclusive blood supply and do not communicate with the intestine. There are only 4 cases reported in the English literature-3 in childhood and 1 in an adult, and all are male. We report a case of noncommunicating isolated ileal duplication cyst in a 3-year-old female child that presented as a mass in the right iliac fossa, mimicking an intussusception. The duplication had its own blood supply arising from the terminal ileal mesentery. This report describes the first female patient with this condition and reviews the English literature.