**7. Congenital umbilical arteriovenous malformation**

The literature reported extremely rare cases of congenital umbilical arteriovenous malformation, less than 10 cases communicated in literature because congenital arteriovenous malformations are found most commonly in the brain, liver, and extremities. Congenital umbilical arteriovenous malformation is congenital lesions presented as a multitude of arteries and veins connected by a fistula. This condition can be asymptomatic but can also lead to congestive heart failure and massive hemorrhagic shock [62].
