Cerebral arteriovenous malformation and dural arteriovenous fistula differences are as follows: 1, different morphology: cerebral arteriovenous malformation in the morphology of the main arteries for blood flow, abnormal deformity of the blood vessel mass and drainage veins, cerebral arteriovenous fistula there is no deformity of the blood vessel mass part of the blood directly from the arteries to the venous sinus or veins, resulting in venous and venous sinus pressure is very high, patients with venous dilation of the venous tortuosity, so in the morphology of the slight similarities 2, the location of the lesion is different: cerebral arteriovenous malformation is mainly in the brain tissue, including bilateral cerebral hemispheres, and cerebellum, brain stem, and arteriovenous fistula mainly occurs in the brain tissue outside of the dura mater, mainly dura mater arteries and veins to communicate with the part of the lesion can be involved to the skull as well as the scalp.