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Gadolinium-enhanced images demonstrate diffuse engorgement of multiple vascular structures extending from hemispheric cortex through subcortical white matter, deep white matter and subependymal margins on both cerebral hemispheres as well as throughout cerebellum and brainstem.
Susceptibility weighted images demonstrate remarkable accentuation of the parenchymal vessels.
There is no recognizable venous obstruction to account for vascular engorgement. There is not a dural fistula.