What are the causes of Dural Arteriovenous Malformations? (DAVM)

Dural avm. Unlike other brain AVMs which are congenital, dural AVMs are believed to be acquired. Dural AVMs are not infectious or inherited. Occasionally, a dural AVM has been reported following cranial surgery.The reasons for the development of dural AVMs are unknown. They may result from a blood clot in a large venous channel which then forms a connection between a dural artery and vein during the repair.