Characteristics and outcome in prenatally diagnosed vascular aortaumbilical vein malformation.

Congenital arteriovenous fistulas involving the abdominal aorta are very rare. We report an unusual presentation involving the umbilical vein and characterized by the occurrence of a postnatal thrombosis and a favorable outcome. Synopsis: Fetal abdominal arteriovenous fistulas are rare involve branches from the aorta and can lead to umbilical vein thrombosis. [ABSTRACT FROM AUTHOR]