Omphalomesenteric duct cyst containing ectopic gastric mucosa in a toddler: a case report

Omphalomesenteric duct cyst (OMDC) is an uncommon remnant of the omphalomesenteric duct. The occurrence of ectopic gastric mucosa within such cysts is rare and may lead to complications due to acid secretion. A 2-year-old girl presented to us with persistent serous umbilical discharge since birth, associated with severe periumbilical excoriation. Ultrasonography showed a 1-cm cystic lesion beneath the umbilicus. Umbilical exploration revealed a cyst posterior to the umbilicus in the pre-peritoneal space, communicating with the skin through a fine sinus tract. The cyst was excised completely. Histopathological examination demonstrated ectopic gastric mucosa within the cyst wall. Postoperatively, the child had an uneventful recovery and was discharged home the day after the procedure. She remains asymptomatic and the excoriation of the skin has resolved. Children presenting with persistent umbilical discharge accompanied by severe skin excoriation should be evaluated for an omphalomesenteric duct cyst containing ectopic gastric mucosa.