Type I Spinal Arteriovenous Fistula with Ventral Intradural Venous Drainage: A Proposal of a Modified Classification.

Asian J Neurosurg. 2018 Oct-Dec;13(4):1048-1052. doi: 10.4103/ajns.AJNS_100_17.

Adeeb NMoore JMAlturki AYBulsara KRGriessenauer CJPatel ASGupta RTubbs RSOgilvy CSThomas AJ.


Abstract

OBJECTIVES:

Spinal arteriovenous fistula (AVF) is the most common spinal vascular lesion and constitutes an abnormal communication between a feeder artery and a draining vein. Arterialization of the venous plexus leads to venous hypertension; consequent edema and congestion of the spinal cord are associated with progressive neurological decline.

PATIENTS AND METHODS:

In this report, we describe two unique cases of type I cervical spinal AVF, in which a radiculomeningeal artery forms an intradural fistula that drains into the ventral venous plexus.

RESULTS:

Both patients underwent surgical obliteration of the fistula with complete occlusion confirmed on postoperative angiography.

CONCLUSION:

Both cases do not fit into the current classification scheme. A modified classification is proposed.

KEYWORDS:

Arteriovenous; Type I; arteriovenous fistulas; classification; fistula; spinal; venous plexus; ventral