ABSTRACT
The vitellointestinal (omphalomesenteric) duct is an embryonic communication between the yolk sac and the midgut. This communication normally disappears at about the sixth week of fetal life. Persistence of the duct between the intestinal tract and the umbilicus, or persistence of its embryonic blood supply, results in a variety of lesions that usually present in early infancy, but occasionally appear later in life.
