scholarly journals EP24 Role of cone-beam CT in the study of cerebral and spinal dural arteriovenous fistulas: qualitative analysis

2021 ◽  
Author(s):  
G Valente ◽  
F Biraschi ◽  
A Salcuni ◽  
F Diana ◽  
C Cirelli ◽  
...  
Keyword(s):  
Qualitative Analysis ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Arteriovenous Fistulas ◽  
Dural Arteriovenous Fistulas ◽  
Spinal Dural Arteriovenous Fistulas

Spinal epidural arteriovenous fistula with perimedullary drainage

2006 ◽  
Vol 5 (4) ◽  
pp. 353-358 ◽  
Author(s):  
Timo Krings ◽  
Michael Mull ◽  
Azize Bostroem ◽  
Juergen Otto ◽  
Franz J. Hans ◽  
...  
Keyword(s):  
Venous Congestion ◽  
Resonance Imaging ◽  
Rare Type ◽  
Arteriovenous Fistulas ◽  
Arteriovenous Shunts ◽  
Dural Arteriovenous Fistulas ◽  
Complete Obliteration ◽  
Spinal Dural Arteriovenous Fistulas ◽  
Spinal Epidural

✓ The classic angiographically demonstrated features of spinal dural arteriovenous fistulas are shunts of radiculomeningeal branches with radicular veins draining exclusively in the direction of perimedullary veins and thereby causing venous congestion. These shunts are located at the point where the radicular vein passes the dura mater. Spinal epidural arteriovenous shunts, however, normally do not drain into the perimedullary veins and are, therefore, asymptomatic, presumably because of a postulated reflux-impeding mechanism between the dural sleeves. The authors report on a patient in whom an epidural arteriovenous shunt showed delayed retrograde drainage into perimedullary veins, leading to the classic clinical (and magnetic resonance imaging–based) findings of venous congestion. Intraoperatively the angiographically established diagnosis was confirmed. Coagulation of both the epidural shunt zone and the radicular vein resulted in complete obliteration of the fistula, as confirmed on repeated angiography. This rare type of fistula should stimulate considerations on the role of valvelike mechanisms normally impeding retrograde flow from the epidural plexus to perimedullary veins and suggest that, in certain pathological circumstances, epidural fistulas can drain retrogradely into perimedullary veins as an infrequent variant of spinal arteriovenous shunts.

Absence of abnormal vessels in the subarachnoid space on conventional magnetic resonance imaging in patients with spinal dural arteriovenous fistulas

2012 ◽  
Vol 32 (5) ◽  
pp. E15 ◽  
Author(s):  
Timothy R. Miller ◽  
Clifford J. Eskey ◽  
Alexander C. Mamourian
Keyword(s):  
Resonance Imaging ◽  
Mri Findings ◽  
Spinal Dural Arteriovenous Fistula ◽  
Arteriovenous Fistulas ◽  
Conventional Mri ◽  
Limited Experience ◽  
Dural Arteriovenous Fistulas ◽  
Uncommon Condition ◽  
Spinal Dural Arteriovenous Fistulas

Spinal dural arteriovenous fistula (DAVF) is an uncommon condition that can be difficult to diagnose. This often results in misdiagnosis and treatment delay. Although conventional MRI plays an important role in the initial screening for the disease, the typical MRI findings may be absent. In this article, the authors present a series of 4 cases involving patients with angiographically proven spinal DAVFs who demonstrated cord T2 prolongation on conventional MRI but without abnormal subarachnoid flow voids or enhancement. These cases suggest that spinal DAVF cannot be excluded in symptomatic patients with cord edema based on conventional MRI findings alone. Dynamic Gd-enhanced MR angiography (MRA) was successful in demonstrating abnormal spinal vasculature in all 4 cases. This limited experience provides support for the role of spinal MRA in patients with abnormal cord signal and symptoms suggestive of DAVF even when typical MRI findings of a DAVF are absent.

scholarly journals Overview of the current role of endovascular and surgical treatment in spinal dural arteriovenous fistulas

2009 ◽  
Vol 26 (1) ◽  
pp. E8 ◽  
Author(s):  
Amir R. Dehdashti ◽  
Leodante B. Da Costa ◽  
Karel G. terBrugge ◽  
Robert A. Willinsky ◽  
Michael Tymianski ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Vascular Malformations ◽  
Endovascular Embolization ◽  
Vascular Lesions ◽  
Current Role ◽  
Arteriovenous Fistulas ◽  
Dural Arteriovenous Fistulas ◽  
Complete Obliteration ◽  
Spinal Dural Arteriovenous Fistulas

Dural arteriovenous fistulas are the most common vascular malformations of the spinal cord. These benign vascular lesions are considered straightforward targets of surgical treatment and possibly endovascular embolization, but the outcome in these cases depends mainly on the extent of clinical dysfunction at the time of the diagnosis. A timely diagnosis is an equally important factor, with early treatment regardless of the type more likely to yield significant improvements in neurological functioning. The outcomes after surgical and endovascular treatment are similar if complete obliteration of the fistulous site is obtained. In the present study, the authors evaluated the current role of each modality in the management of these interesting lesions.

Report of a spinal extradural arteriovenous fistula with double radiculomedullary venous drainage: therapeutic implications and role of intraoperative spinal angiography

2021 ◽  
pp. 1-5
Author(s):  
Risheng Xu ◽  
Lydia Gregg ◽  
Sheng-fu Larry Lo ◽  
Philippe Gailloud
Keyword(s):  
Venous Drainage ◽  
Low Flow ◽  
Digital Subtraction ◽  
Therapeutic Implications ◽  
Arteriovenous Fistulas ◽  
True Prevalence ◽  
Dural Arteriovenous Fistulas ◽  
The One ◽  
Spinal Dural Arteriovenous Fistulas

Low-flow spinal extradural arteriovenous fistulas (SEAVFs) are frequently misdiagnosed as spinal dural arteriovenous fistulas (SDAVFs), and their true prevalence is unknown. The principal feature distinguishing low-flow SEAVFs from SDAVFs is the location of the shunt, which involves a pouch of epidural plexus in SEAVFs and a radiculomedullary vein (RMV) in SDAVFs. A venous hypertensive myelopathy comparable to the one observed with SDAVFs develops when the arterialized venous pouch of an SEAVF is connected to an RMV. Depending on the size of the epidural pouch, a low-flow SEAVF may uncommonly drain into multiple RMVs. The authors present an observation of a low-flow SEAVF whose double radiculomedullary drainage was revealed only after intraoperative digital subtraction angiography, and they discuss the surgical implications of this anatomical configuration.

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