Recognition of dural to pial supply in high-grade dural arteriovenous fistula: A technical note.
Shigeta Miyake, Tze Phei Kee, Ivan Radovanovic et al.
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From the abstract
High-grade dural arteriovenous fistulas (DAVFs) are known to demonstrate classical dural supply and can demonstrate pre-existing dural supply and 'pure' arterial supply from pial branches. The latter two are examples of congenital versus acquired pial to dural shunting, respectively.