Retrieval of a microcatheter from arteriovenous malformations after hemorrhage following Onyx embolization.

Retained microcatheter is a rare complication during embolization of arteriovenous malformations (AVMs). Following the availability and popularization of Onyx, the incidence of retained catheter has become lesser. Though there have been reports of retained microcatheter during embolization of AVM with Onyx, there has been only one previous report of surgical retrieval of retained microcatheter. We report the second case of retrieval of retained microcatheter following embolization of AVM with Onyx.