Teaching NeuroImages: Spontaneous involution of symptomatic delayed tumefactive cyst following radiosurgery for AVM

A 65-year-old woman underwent radiosurgery for a left temporal arteriovenous malformation (AVM) (figure 1A). Follow-up MRI/magnetic resonance angiography 3 years later demonstrated postradiation changes (figure 1B) and AVM resolution (figure 2). Six years posttreatment, she had progressive headaches and aphasia and a large cyst (figure 1C). Her symptoms resolved acutely without treatment. MRI 3 months later showed reduction of the cyst with mass effect resolution related to spontaneous fenestration in the ventricle (figure 1D).

Source: Neurology - October 16, 2017 Category: Neurology Authors: Aiello, G., Snyder, K., Brinjikji, W., Lanzino, G. Tags: MRI, Arteriovenous malformation RESIDENT AND FELLOW SECTION Source Type: research