An example of a cerebral arteriovenous malformation (CAVM) with a small, compact nidus of serpiginous malformed vessels in the posterior temporal lobe successfully treated with CyberKnife and its treatment effects on imaging around 5,10, 18 and 30 months afterwards.

The contrast uptake visible 10 and 18 months after stereotactic radiosurgery seems to be due to a tissue reaction with edema, inflammation and increased permeability, which can be commonly found after a certain amount of time ^1,2.