Дуральная артериовенозная фистула с наличием ретроградного дренажа в корковые вены (клинический случай)

We present clinical case of a patient who was referred for brain MRI to clarify the cause of a first-time seizure. MRI examination showed cortical and medullary veins ectasia in the left cerebral hemisphere with multiple cerebral microbleeds around the medullary veins. The revealed changes were considered as a manifestation of regional venous hypertension, however, its cause remained unclear. We decided to perform non-contrast 3D-TOF angiography that revealed a dural arteriovenous fistula between the left occipital artery and the sigmoid venous sinus with retrograde drainage into cortical veins (Borden type II, Cognard type IIb). Early diagnosis and treatment of «aggressive» dural arteriovenous fistulas avoids the development of lifethreatening complications (an annual hemorrhage rate of 8,1%).