We present an unusual case in whom a small congenital hernia of the umbilic
al cord and associated patent omphalomesenteric duct were diagnosed at midt
rimester ultrasonography. The diagnosis was confirmed following delivery, a
nd neonatal corrective surgery was performed. We compare prenatal ultrasoun
d findings of umbilical hernia and associated persistent omphalomesenteric
duct with those of omphalocele, Copyright (C) 2001 S. Karger AG, Basel.