Spinal arteriovenous fistula: extradural or intradural.
Spinal vascular pathological conditions can be classified into different subtypes especially by the use of magnetic resonance imaging (MRI) and selective digital subtraction angiography (DSA).
There are three current era classification systems.
Different types of spinal arteriovenous malformation (AVM) have differing age of presentation, but overall 80% present between the age 20 and 60 years.
Embolization of a spinal cord arteriovenous malformation (AVM) is considered a high-risk procedure due to the potential risk of spinal cord injury.
see also Spinal dural arteriovenous fistula.