Resorption of Embolic Material in Arteriovenous Malformation (AVM)

Vascular brain lesions have increased risk of intracranial bleeding and, therefore, present a challenge to neurosurgeons attempting surgical resection.  Such tumors may first be embolized prior to surgical excision in order to reduce the risk of bleeding.  Onyx, an ethylene vinyl alcohol copolymer, is one of many embolic agents available to accomplish this task.  Onyx has... Continue Reading →

Arteriovenous Malformation

Arteriovenous malformation, or AVM, is a collection of abnormal vessels that lack an intervening capillary bed and are separated by gliotic brain tissue.  Some vessels have thick walls with elastic laminae typical of arteries, while others have thin collagenous walls typical of veins. In addition, "arterialization of a vein" can also be seen in which... Continue Reading →

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