PERSISTENT RIGHT UMBILICAL VEIN IN TRISOMY-18 - SONOGRAPHIC OBSERVATION

Persistent right umbilical vein is a rare entity, with a prevalence of about 0.22%.(1) The intrahepatic variant is observed most frequently, and 72% of the fetuses are normal.(2,3) In a very limited number of c ases, the persistent right umbilical vein terminates directly into the right atrium, without passage into the liver. The majority of fetuses with this variety have multiple congenital malformations.(2) We repor t a case of persistent right umbilical vein draining directly into the right atrium in association with trisomy 18. Although particular sono graphic markers related to Edwards syndrome were present in our case, we would recommend fetal karyotyping in all cases of persistent right umbilical vein.