Coil migration during endovascular treatment in a patient with Galenic arteriovenous malformation

High flow arteriovenous malformations are commonly treated by using an endovascular approach with detachable coils. Although the risk of coil migration or distal embolisation into the venous system is almost always a consideration when treating these lesions, coil migration of a coil mass comprised of several coils is uncommonly seen, and not recorded. We report a case of Galenic arteriovenous malformation in a 22-year-old male in which coil migration was observed during the endovascular procedure. Possible mechanisms are discussed.