What is the clinical significance of that contrast enhancement?
Contrast enhancement is a common delayed phenomenon after stereotactic radiosurgery and does not have any other clinical significance than follow up examinations.
Findings:
Hyperintense signal in the posterior periventricular white matter at the location of the previous cerebral arteriovenous malformation (CAVM), with avid contrast enhancement. No residual serpiginous vessels.
The two draining veins have disappeared.
Impression:
Postradiogenic changes and enhancement after CyberKnife therapy.
Further decrease of the nidus with complete calliper reduction of the draining veins.