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How can the removal of an AVM in the brain cause aphasia?

Dr. Geoffrey P. Colby, MD
Neurosurgery
If an arteriovenous malformation (AVM) is located in either the speech center or receptive language areas of the brain, then disrupting that area while removing the AVM may cause aphasia (loss of speech) or disruption in reading, writing or language functions. Great care is taken to avoid injury and neurological deficit if an AVM is treated near these eloquent brain areas.

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