Omphalocele associated with umbilical cord allantoic cyst: sonographic evaluation in utero

The ultrasonographic in utero diagnosis of nine fetal omphaloceles was made between 1978 and 1982. In three patients an allantoic cyst of the umbilical cord was associated with the abdominal wall defect. This association should alert the ultrasonographer to consider the possibility of omphalocele when an apparent cyst of the umbilical cord is observed.