AVM treated with SRS in May 2015: please evaluate for post-radiation change. MRI: There is interval decrease in size of the enhancement surrounding the site of the treated left temporo-occipital region arteriovenous malformation. There is also substantial decrease in the extent of surrounding vasogenic edema. There is no evidence of acute intracranial hemorrhage or acute infarct. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.MRA: There is no discernible arterialized flow at the site of the treated arteriovenous malformation. There is no evidence of significant steno-occlusive lesions in the regular cerebral arteries. There is no evidence of aneurysms.
1. Interval decreased edema associated with radiation necrosis at the site of the treated left temporo-occipital region arteriovenous malformation. 2. No gross recurrence of the treated left temporo-occipital region arteriovenous malformation, within the limits of MRA.