Prenatal ultrasonographic diagnosis of congenital umbilical hernia and associated patent omphalomesenteric duct.

We present an unusual case in whom a small congenital hernia of the umbilical cord and associated patent omphalomesenteric duct were diagnosed at midtrimester ultrasonography. The diagnosis was confirmed following delivery, and neonatal corrective surgery was performed. We compare prenatal ultrasound findings of umbilical hernia and associated persistent omphalomesenteric duct with those of omphalocele.