Correction: Dural Arteriovenous Fistulous Malformations

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    Illustration showing a spinal Type I(a) dural arteriovenous fistulous malformation. The fistula on the nerve root sleeve is fed by meningeal branches of the radicular artery. The dilated venous plexus causes nerve root and spinal cord compression; however, venous drainage of the spinal cord is not affected. ara = anterior branch of radicular artery; df = dural fistula; dsv = dorsal spinal cord venous plexus draining into radicular vein; dvp = dural venous plexus, arterialized and dilated; md = meningeal (or true) dura; mra = meningeal branch of radicular artery; ra = radicular artery; rv = radicular vein; sp = spinal periosteum (or periosteal dura).

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    Illustration showing a spinal Type III(a) dural arteriovenous fistulous malformation. The arteriovenous fistula on nerve root sleeve is fed by meningeal branch of radicular artery and drains into the dorsal spinal venous plexus through a subarachnoid anastomotic vein (arterialized). The dural venous plexus between the spinal periosteum and meningeal dura does not drain the fistula. ara = anterior branch of radicular artery; df = dural fistula; dsf = dorsal spinal cord venous plexus draining into radicular vein; dvp = dural venous plexus; md = meningeal (or true) dura; mra = meningeal branch of radicular artery; ra = radicular artery; rv = radicular vein; pra = posterior branch of radicular artery; sp = spinal periosteum (or periosteal dura).

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