The treatment of arteriovenous malformation (AVM) is still a challenging problem in the neurosurgical field. The usual operative procedure has been the removal of the AVM by sucking the gliosis which surrounds it. However, by using such a method in the functional area, especially the sensory and motor cortex, it has been impossible to remove the AVM without postoperative neurological deficit. Recent reports have shown that a 1 mm thickness of the brain around a large AVM is non-functioning;1,2 therefore, we aimed to remove only the AVM without sucking the brain.
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