Certain blood vessel abnormalities inside the skull and brain can be treated with Gamma Knife. Sometimes these require multiple treatments, including open neurosurgery and intravascular injections of coils and glue. Arteriovenous malformation (also called AVM) and dural arteriovenous fistula (or DAVF) are two conditions that have been successfully treated with radiosurgery, sometimes with no other treatment, and sometimes as part of multiple approaches.