PHIL in the Treatment of Intracranial dAVF.

Inclusion Criteria: * Age 22 - 80 years. * Subject is willing and capable of complying with all study protocol requirements, including specified follow-up period. * Subject or authorized legal representative must provide written informed consent prior to initiation of any study procedures. * Subject has an intracranial dAVF Exclusion Criteria: * Subject having multiple dAVFs to be treated. * Subject with a history of life threatening allergy to contrast media (unless treatment for allergy is tolerated). * Subject has known allergies to dimethylsulfoxide, iodine. * Subject is currently participating in another clinical study * Female subject is currently pregnant. * Subject has co-morbid conditions that may limit survival to less than 24 months.