title: Spontaneous Aggressive Conversion of Venous Drainage Pattern in Dural Arteriovenous Fistula Treated with Onyx Embolization.
abstract: We report a case of dural arteriovenous fistula (DAVF) that showed spontaneous conversion of venous drainage pattern from Borden type II to type III within a four month period of follow-up. Upon admission, the patient presented with aggravated neurologic status and newly developed seizure. After admission, endovascular embolization was performed through the middle meningeal artery with Onyx®. Complete obliteration of dural arteriovenous shunt was confirmed by angiography, and the patient's clinical symptoms improved. Although most cases of DAVF show benign clinical course and conversion pattern, close follow-up is required to detect potential aggravation.
authors.affiliation: Department of Neurosurgery, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.
authors.forename: Yeongu
authors.initials: Y
authors.lastname: Chung
authors.affiliation: Department of Neurosurgery, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.
authors.forename: Seok Keun
authors.initials: SK
authors.lastname: Choi
authors.affiliation: Department of Neurosurgery, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.
authors.forename: Sung Ho
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Radiology, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.
authors.forename: Eui Jong
authors.identifier: 0000-0003-2183-8657
authors.initials: EJ
authors.lastname: Kim
keywords: Conversion of venous drainage pattern; Cortical venous reflux; Dural arteriovenous fistula; Onyx embolization