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If an arteriovenous malformation (AVM) in the brain has caused a hemorrhage, the risk is high enough for another hemorrhage that the AVM should be treated. There are three kinds of treatments: surgery, embolization, which is injecting particles (a glue-like substance) through a catheter to block off the AVM, and radiation therapy, also called stereotactic radiosurgery. With this combination of treatments, the vast majority of AVMs that are dangerous can be treated effectively.
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