The omphalomesenteric duct (OMD, vitelline duct) connects the yolk sac and small bowel. It usually regresses by the ninth week of gestation leaving a fibrous cord. Persistence of all or part of the omphalomesenteric duct may present with a variety of clinical findings.

Clinical Finding


umbilical discharge (feculent, bilious or serosanguinous)

entire duct patent

discolored skin lesion at the umbilicus

ectopic gastric or intestinal tissue

cystic mass in the lower anterior abdominal wall in the midline

persistent midportion of the duct with both ends closed

abscess at the umbilicus or in underlying tissues

infected cyst or involvement of duct remnant that opens to the skin surface

small bowel obstruction

due to volvulus, fibrous band or other mechanism

prolapse of ileum at the umbilicus

entire duct patent

Meckel’s diverticulum

persistent duct at intestinal end with fibrosis in mid and distal portions of the duct

umbilical hernia



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