Prenatal sonographic findings of duodenal duplication: case report

We report a rare case of duodenal duplication cyst that was suspected prenatally. Routine prenatal sonography (US) at 19 weeks' gestation showed an abdominal cystic mass on the left side of the abdomen. Follow-up US examinations showed a partial "double-wall" sign, highly suggestive of enteric duplication, and changes in cyst size and wall thickness. Postnatal US examination suggested enteric duplication cyst. A laparotomy revealed a duodenal cyst that was completely resected. The antenatal US findings associated with this condition, the accuracy of its antenatal diagnosis, and its differential diagnosis are discussed.